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A082033
a(n) = (3n+1)*n!.
5
1, 4, 14, 60, 312, 1920, 13680, 110880, 1008000, 10160640, 112492800, 1357171200, 17723059200, 249080832000, 3748666521600, 60153020928000, 1025216704512000, 18495746260992000, 352130553815040000, 7055415823712256000
OFFSET
0,2
COMMENTS
A row of the number array A082037.
LINKS
Luis Manuel Rivera, Integer sequences and k-commuting permutations, arXiv preprint arXiv:1406.3081, 2014
FORMULA
a(n) = A016777(n)*n!.
3*a(n) +(-3*n-5)*a(n-1) +2*(n-1)*a(n-2)=0. - R. J. Mathar, Oct 29 2014
PROG
(Magma) [(3*n+1)*Factorial(n): n in [0..20]]; // Vincenzo Librandi, May 09 2011
CROSSREFS
Sequence in context: A307411 A349018 A259104 * A009339 A050912 A250399
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Apr 02 2003
STATUS
approved