A086094 Permanent of the n X n matrix whose element (i,j) equals t(|i-j|) where t(n) is the number of divisors of n and t(0) = 0.

0, 1, 4, 49, 594, 9088, 192550, 4400305, 123753812, 3913346101, 143259991494, 5423531436645, 254447352721880, 12256517669340701, 645137240849841756, 37228477466802215873, 2388339009798778979334, 155663410717277848640228

Offset

1,3

Links

Table of n, a(n) for n=1..18.

Prog

(PARI) a(n) = {my(M=matrix(n, n, i, j, if(i==j, 0, numdiv(abs(i-j))))); matpermanent(M)} \\ Herman Jamke (hermanjamke(AT)fastmail.fm), May 14 2007

Crossrefs

Cf. A071084.

Sequence in context: A273230 A199028 A189146 * A055793 A202829 A204233

Adjacent sequences: A086091 A086092 A086093 * A086095 A086096 A086097

Keyword

nonn,changed

Author

Yuval Dekel (dekelyuval(AT)hotmail.com), Aug 24 2003

Extensions

More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), May 14 2007

Status

approved