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A171295
Number of 1..21 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
21, 441, 9239, 193017, 4046097, 84702206, 1772179733, 37103518720, 776455731351
OFFSET
1,1
COMMENTS
column 21 of A171275.
CROSSREFS
Sequence in context: A189060 A224009 A167255 * A009965 A285873 A189433
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 06 2009
STATUS
approved