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A160793
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Natural numbers and the sum of first n primes interleaved.
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3
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1, 2, 2, 5, 3, 10, 4, 17, 5, 28, 6, 41, 7, 58, 8, 77, 9, 100, 10, 129, 11, 160, 12, 197, 13, 238, 14, 281, 15, 328, 16, 381, 17, 440, 18, 501, 19, 568, 20, 639, 21, 712, 22, 791, 23, 874, 24, 963, 25, 1060, 26, 1161, 27, 1264, 28, 1371, 29, 1480
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Also first differences of A160792: length of edges of a square spiral related to prime numbers A000040 whose vertices are the numbers A160792.
A000027 and A007504 interleaved. - Omar E. Pol, Oct 31 2011
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FORMULA
| a(2n-1) = n, a(2n) = A007504(n). - Omar E. Pol, Oct 31 2011
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CROSSREFS
| Cf. A000040, A160790, A160791, A160792.
Sequence in context: A152991 A163298 A133440 * A006800 A190170 A147524
Adjacent sequences: A160790 A160791 A160792 * A160794 A160795 A160796
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KEYWORD
| easy,nonn
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AUTHOR
| Omar E. Pol (info(AT)polprimos.com), May 29 2009
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EXTENSIONS
| More terms from Sean A. Irvine (sairvin(AT)xtra.co.nz), Oct 31 2011
New definition from Omar E. Pol, Oct 31 2011
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