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A171278 Number of 1..4 integer arrays v[1..n] of length n with all autocorrelation values sum(i){v[i]*v[i-k]} distinct for k in 0..n-1 0
4, 16, 62, 240, 914, 3508, 13297, 50461, 191050, 722932, 2726415, 10295319, 38671908, 146751022, 550500089, 2073212701, 7808201806, 29400052201, 110000818929 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

column 4 of A171275.

LINKS

Table of n, a(n) for n=1..19.

CROSSREFS

Sequence in context: A268429 A195339 A172025 * A227438 A206839 A244827

Adjacent sequences:  A171275 A171276 A171277 * A171279 A171280 A171281

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 06 2009

STATUS

approved

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Last modified June 24 21:16 EDT 2019. Contains 324337 sequences. (Running on oeis4.)