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A024380 4th elementary symmetric function of the first n+3 positive integers congruent to 1 mod 4. 1
585, 14389, 122119, 633619, 2441334, 7680414, 20836578, 50469738, 111748263, 230015643, 445638193, 820409317, 1445812732, 2453473932, 4028156052, 6423683172, 9982200981, 15157211601, 22540846251, 32895866311, 47192910226, 66653530570 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..22.

FORMULA

a(n) = n*(n+1)*(n+2)*(n+3)*(240*n^4+1920*n^3+4760*n^2+3072*n-1217)/360. G.f.: x*(585+9124*x+13678*x^2+3412*x^3+81*x^4)/(1-x)^9 . [From R. J. Mathar, Sep 15 2009]

CROSSREFS

Sequence in context: A250627 A043428 A038486 * A258331 A022243 A217446

Adjacent sequences:  A024377 A024378 A024379 * A024381 A024382 A024383

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified April 23 14:15 EDT 2019. Contains 322386 sequences. (Running on oeis4.)