A061834 - OEIS

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A061834

a(n) = binomial(n,2) * !n.

0, 0, 2, 12, 60, 340, 2310, 18354, 165592, 1664424, 18410130, 222085270, 2901011124, 40790592492, 614247917374, 9862468172970, 168192316357680, 3036117383306704, 57835808554908042, 1159445925005561694, 24400842327684259660, 537878773763482265940

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

REFERENCES

See A003422 for !n.

LINKS

Harry J. Smith, Table of n, a(n) for n = 0..200

Index entries for sequences related to final digits of numbers

PROG

(PARI) { f=1; L=0; for (n=0, 200, if (n, L+=f; f*=n); write("b061834.txt", n, " ", L*binomial(n, 2)) ) } \\ Harry J. Smith, Jul 28 2009

CROSSREFS

Cf. A003422.