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0, 1, 9, 18, 34, 51, 75, 100, 132, 165, 205, 246, 294, 343, 399, 456, 520, 585, 657, 730, 810, 891, 979, 1068, 1164, 1261, 1365, 1470, 1582, 1695, 1815, 1936, 2064, 2193, 2329, 2466, 2610, 2755, 2907, 3060, 3220, 3381, 3549, 3718, 3894
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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COMMENTS
| Sequence found by reading the line from 0, in the direction 0, 9,... and the line from 1, in the direction 1, 18,..., in the square spiral whose vertices are the triangular numbers A000217.
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LINKS
| O. E. Pol, Determinacion geometrica de los numeros primos y perfectos.
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FORMULA
| Array read by rows: row n gives 8*n^2+n, 8*(n+1)^2 - 7(n+1).
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EXAMPLE
| Array begins:
0, 1
9, 18
34, 51
75, 100
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CROSSREFS
| Cf. A000217, A046092, A051870, A139275, A077221, A139592, A139593, A139595, A139596, A139597, A139598.
Sequence in context: A161570 A140089 A183444 * A191268 A109668 A051063
Adjacent sequences: A139588 A139589 A139590 * A139592 A139593 A139594
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KEYWORD
| easy,nonn
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AUTHOR
| Omar E. Pol (info(AT)polprimos.com), May 03 2008
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