A160553 Numbers n not of the form 7k+4 such that A000041(49n+47) == 0 (mod 343).

36, 37, 55, 70, 79, 84, 93, 99, 105, 111, 118, 128, 134, 138, 140, 149, 156, 161, 163, 168, 174, 180, 185, 199, 208, 230, 240, 245, 247, 254, 255, 257, 260, 278, 282, 283, 289, 299, 300, 301, 331, 363, 365, 376, 377, 384, 385, 387, 397, 400

Offset

1,1

Links

Table of n, a(n) for n=1..50.

Watson, G. N., Ramanujans Vermutung ueber Zerfaellungsanzahlen. J. Reine Angew. Math. (Crelle), 179 (1938), 97-128. See p. 128.

Prog

(PARI) for(n=1, 10^3, if(n%7==4, next); if( numbpart(49*n+47)%343==0, print1(n, ", ")) ) \\ Max Alekseyev, Feb 13 2012

Crossrefs

Sequence in context: A165857 A218052 A098079 * A295751 A031317 A257441

Adjacent sequences: A160550 A160551 A160552 * A160554 A160555 A160556

Keyword

nonn

Author

N. J. A. Sloane, Nov 14 2009

Extensions

Watson found the terms 36, 37, 55 via A002300.

Extended to a(24)=199 using Watson's method (but with Maple's help) by N. J. A. Sloane, Nov 14 2009

Terms a(25) onward from Max Alekseyev, Feb 13 2012

Status

approved