A171309 - OEIS

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A171309

Number of 0..3 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, 15, 53, 138, 483, 1678, 5634, 18915, 62325, 204315, 683210, 2277118, 7559559, 25132611, 83206528, 274465209, 907716605, 3004041236, 9908081432

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OFFSET

1,1

COMMENTS

column 4 of A171307.

LINKS

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

CROSSREFS

Sequence in context: A057332 A230623 A162978 * A210781 A367818 A303271

Adjacent sequences: A171306 A171307 A171308 * A171310 A171311 A171312

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 06 2009

STATUS

approved