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Search: id:A128373
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| A128373 |
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Irregular triangle read by rows: row n (n>=2) lists positions in the sequence A007318 where n appears. |
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1
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| 4, 7, 8, 11, 13, 16, 19, 12, 22, 26, 29, 34, 37, 43, 46, 53, 17, 18, 56, 64, 67, 76, 79, 89, 92, 103, 106, 118, 23, 25, 121, 134, 137, 151, 154, 169, 172, 188, 191, 208, 24, 211, 229, 30, 33, 232, 251, 254, 274, 277, 298, 301, 323, 326, 349, 352, 376, 379, 404, 38
(list; graph; listen)
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OFFSET
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2,1
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EXAMPLE
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In A007318, the number 2 appears in position 4, so the first row is 4. The number 3 appears in positions 7 and 8 in A007318, so the second row is 7, 8.
The irregular triangle begins:
4
7, 8
11, 13
16, 19
12, 22, 26
29, 34
37, 43
46, 53
...
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CROSSREFS
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Cf. A003015, A003016, A007318, A059233.
Sequence in context: A084791 A001494 A092214 this_sequence A080578 A047347 A137362
Adjacent sequences: A128370 A128371 A128372 this_sequence A128374 A128375 A128376
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KEYWORD
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easy,nonn,tabf
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AUTHOR
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Nick Hobson (nickh(AT)qbyte.org), Mar 01 2007
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