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A098764 a(n) = 3p - q where p and q are consecutive primes. 2
3, 4, 8, 10, 20, 22, 32, 34, 40, 56, 56, 70, 80, 82, 88, 100, 116, 116, 130, 140, 140, 154, 160, 170, 190, 200, 202, 212, 214, 212, 250, 256, 272, 268, 296, 296, 308, 322, 328, 340, 356, 352, 380, 382, 392, 386, 410, 442, 452, 454, 460, 476, 472, 496, 508, 520 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

COMMENTS

Except for the initial term, a(n)=={2, 4} mod 6.

FORMULA

3*A000040 - 3 - A086801(n).

a(n) = 3*A000040(n)-A000040(n+1) = A001748(n)-A000040(n+1) = A001747(n+1)-A001223(n). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 22 2010]

CROSSREFS

Equals A001043(n) - 2*A001223(n+1). Cf. A000040, A047235, A086801.

Sequence in context: A115264 A147617 A072606 * A105407 A047458 A004014

Adjacent sequences:  A098761 A098762 A098763 * A098765 A098766 A098767

KEYWORD

nonn

AUTHOR

Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Sep 30 2004

EXTENSIONS

Corrected (116 duplicated) by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 22 2010

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Last modified February 16 11:51 EST 2012. Contains 205908 sequences.