A032072 Number of reversible strings with n labeled beads of 5 colors, no palindromes of more than 1 bead.

5, 20, 300, 7200, 180000, 5580000, 195300000, 7862400000, 353808000000, 17713080000000, 974219400000000, 58468132800000000, 3800428632000000000, 266043625848000000000

Offset

1,1

Links

Table of n, a(n) for n=1..14.

C. G. Bower, Transforms (2)

Formula

"BHJ" (reversible, identity, labeled) transform of 5, 0, 0, 0...

n! * A032088.

Crossrefs

Sequence in context: A198037 A203213 A203206 * A002030 A213148 A202860

Adjacent sequences: A032069 A032070 A032071 * A032073 A032074 A032075

Keyword

nonn

Author

Christian G. Bower

Status

approved