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Search: id:A114319
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| A114319 |
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Self-describing sequence. See the sequence as a succession of digits: then a(n) is the position of a non-composite digit in the sequence. |
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+0
1
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| 1, 2, 3, 6, 8, 14, 16, 44, 46, 54, 56, 64, 66, 68, 69, 84, 86, 88, 89, 94, 96, 98, 99, 440, 454, 464, 466, 540
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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"Non-composite" digits are: 0, 1, 2, 3, 5 and 7.
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EXAMPLE
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Non-composite digits are between brackets:
Sequence: (1),(2),(3),6,8,(1)4,(1)6,44,46,(5)4,(5)6...
Digit pos: first 2nd 3rd 6th 8th 14th 16th ... etc. = sequence itself.
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CROSSREFS
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Adjacent sequences: A114316 A114317 A114318 this_sequence A114320 A114321 A114322
Sequence in context: A004101 A003405 A153918 this_sequence A089426 A066739 A066815
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KEYWORD
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base,easy,more,nonn
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AUTHOR
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Eric Angelini (eric.angelini(AT)kntv.be), Feb 05 2006
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