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Search: id:A162619
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| 1, 1, 2, 2, 3, 4, 3, 4, 5, 6, 6, 7, 8, 9, 10, 7, 8, 9, 10, 11, 12, 10, 11, 12, 13, 14, 15, 16, 11, 12, 13, 14, 15, 16, 17, 18, 14, 15, 16, 17, 18, 19, 20, 21, 22, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 25, 26, 27, 28, 29, 30, 31, 32, 33
(list; table; graph; listen)
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OFFSET
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1,3
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COMMENT
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Note that the last term of the n-th row is A000040(n)-1 = A006093(n).
See also A162618 and A162620.
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EXAMPLE
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Triangle begins:
.1;
.1, 2;
.2, 3, 4;
.3, 4, 5, 6;
.6, 7, 8, 9,10;
.7, 8, 9,10,11,12;
10,11,12,13,14,15,16;
11,12,13,14,15,16,17,18;
14,15,16,17,18,19,20,21,22;
19,20,21,22,23,24,25,26,27,28;
20,21,22,23,24,25,26,27,28,29,30;
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CROSSREFS
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Cf. A000040, A006093, A014689, A159797, A159798, A162611, A162618, A162620.
Sequence in context: A051162 A122872 A132919 this_sequence A032355 A091257 A003991
Adjacent sequences: A162616 A162617 A162618 this_sequence A162620 A162621 A162622
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KEYWORD
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easy,nonn,tabl
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Jul 10 2009
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