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A082034 a(n) = (4*n + 1)*n!. 3
1, 5, 18, 78, 408, 2520, 18000, 146160, 1330560, 13426560, 148780800, 1796256000, 23471078400, 330032102400, 4969162598400, 79768136448000, 1359981342720000, 24542432538624000, 467373280518144000, 9366672731480064000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

A row of the array A082037.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..400

FORMULA

a(n) = A016813(n)*n!.

(-4*n+3)*a(n) + n*(4*n+1)*a(n-1) = 0. - R. J. Mathar, Nov 07 2014

4*a(n) + (-4*n-7)*a(n-1) + 3*(n-1)*a(n-2) = 0. - R. J. Mathar, Nov 07 2014

PROG

(MAGMA) [(4*n+1)*Factorial(n) : n in [0..20]]; // Vincenzo Librandi, Sep 22 2011

CROSSREFS

Cf. A082033, A007680.

Sequence in context: A227451 A017960 A162814 * A259340 A241713 A002826

Adjacent sequences:  A082031 A082032 A082033 * A082035 A082036 A082037

KEYWORD

nonn,easy

AUTHOR

Paul Barry, Apr 02 2003

STATUS

approved

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Last modified August 11 00:32 EDT 2020. Contains 336403 sequences. (Running on oeis4.)