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A068037 Number of subsets of {1,2,3,...,n} that sum to 0 mod 16. 1
1, 1, 1, 1, 1, 1, 4, 9, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072, 262144, 524288, 1048576, 2097152, 4194304, 8388608, 16777216, 33554432, 67108864, 134217728, 268435456, 536870912, 1073741824, 2147483648 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,7

LINKS

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

FORMULA

Conjecture: a(n) = 2^(-4+n) for n>7. G.f.: (2*x^8 -x^7 -2*x^6 +x^5 +x^4 +x^3 +x^2 +x -1) / (2*x -1). [Colin Barker, Dec 22 2012]

CROSSREFS

16th row of A068009.

Sequence in context: A281904 A007679 A239870 * A167188 A295720 A296152

Adjacent sequences:  A068034 A068035 A068036 * A068038 A068039 A068040

KEYWORD

nonn

AUTHOR

Antti Karttunen, Feb 11 2002

STATUS

approved

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Last modified May 24 23:45 EDT 2020. Contains 334581 sequences. (Running on oeis4.)