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

4, 16, 62, 240, 914, 3508, 13297, 50461, 191050, 722932, 2726415, 10295319, 38671908, 146751022, 550500089, 2073212701, 7808201806, 29400052201, 110000818929

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