A068035 Number of subsets of {1,2,3,...,n} that sum to 0 mod 14.

1, 1, 1, 1, 1, 2, 5, 10, 19, 37, 73, 147, 293, 586, 1172, 2342, 4682, 9362, 18726, 37450, 74900, 149800, 299596, 599188, 1198372, 2396748, 4793492, 9586984, 19173968, 38347928, 76695848, 153391688, 306783384, 613566760, 1227133520, 2454267040

Offset

0,6

Links

Table of n, a(n) for n=0..35.

Formula

Empirical G.f.: -(2*x^13+x^12-3*x^11-x^10-x^9-x^8+2*x^7-x^6+x^4+x^3+x^2+x-1) / ((2*x-1)*(2*x^7-1)). [Colin Barker, Dec 22 2012]

Crossrefs

14th row of A068009.

Sequence in context: A052944 A132736 A263366 * A304973 A016029 A018327

Adjacent sequences: A068032 A068033 A068034 * A068036 A068037 A068038

Keyword

nonn

Author

Antti Karttunen, Feb 11 2002

Status

approved