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A171294
Number of 1..20 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
20, 400, 7978, 158720, 3167712, 63133961, 1257532904, 25067835333, 499409248793
OFFSET
1,1
COMMENTS
column 20 of A171275.
CROSSREFS
Sequence in context: A224386 A189198 A224019 * A267793 A009964 A285874
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 06 2009
STATUS
approved