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Search: id:A138724
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| A138724 |
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Atomic numbers of the periodic table of the elements, read downwards along 18 columns, up to the 7th period. |
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+0
9
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| 1, 3, 11, 19, 37, 55, 87, 4, 12, 20, 38, 56, 88, 21, 39, 57, 89, 22, 40, 72, 104, 23, 41, 73, 105, 24, 42, 74, 106, 25, 43, 75, 107, 26, 44, 76, 108, 27, 45, 77, 109, 28, 46, 78, 110, 29, 47, 79, 111, 30, 48, 80, 112, 5, 13, 31, 49, 81, 113
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OFFSET
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1,2
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COMMENT
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This finite sequence has 90 members. Atomic numbers of the elements of Lanthanide series (58 to 71) and Actinide series (90 to 103) and atomic numbers > 118 are not members.
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EXAMPLE
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=====================================================================
................. THE PERIODIC TABLE OF THE ELEMENTS ................
=====================================================================
1A 2A 3B .4B .5B .6B .7B .8B .8B .8B .1B .2B .3A .4A .5A .6A .7A .8A
=====================================================================
1. .. .. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ..2
3. 4. .. ... ... ... ... ... ... ... ... ... ..5 ..6 ..7 ..8 ..9 .10
11 12 .. ... ... ... ... ... ... ... ... ... .13 .14 .15 .16 .17 .18
19 20 21 .22 .23 .24 .25 .26 .27 .28 .29 .30 .31 .32 .33 .34 .35 .36
37 38 39 .40 .41 .42 .43 .44 .45 .46 .47 .48 .49 .50 .51 .52 .53 .54
55 56 57 .72 .73 .74 .75 .76 .77 .78 .79 .80 .81 .82 .83 .84 .85 .86
87 88 89 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118
=====================================================================
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CROSSREFS
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Cf. A099955, A134984, A138723, A138725, A138726, A138727.
Sequence in context: A085616 A138723 A099955 this_sequence A134984 A138725 A138726
Adjacent sequences: A138721 A138722 A138723 this_sequence A138725 A138726 A138727
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KEYWORD
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easy,fini,nonn,tabf
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Mar 26 2008, Jan 25 2009
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