A006236 - OEIS

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A006236

a(n) = n^(n-2)*(n+2)^(n-1).
(Formerly M3698)

1, 4, 75, 3456, 300125, 42467328, 8931928887, 2621440000000, 1025271882697689, 515978035200000000, 325063112540091870659, 250738401558910243700736, 232526248038920243408203125, 255326682647558617373989666816, 327696095670976278474202880859375, 486146690661928563361690196851556352

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

OFFSET

1,2

REFERENCES

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

T. D. Noe, Table of n, a(n) for n = 1..100

Germain Kreweras, Complexité et circuits Eulériens dans les sommes tensorielles de graphes, J. Combin. Theory, B 24 (1978), 202-212.

MATHEMATICA

Table[n^(n - 2)*(n + 2)^(n - 1), {n, 20}] (* T. D. Noe, May 29 2012 *)

CROSSREFS

Sequence in context: A006412 A206456 A137220 * A374884 A120248 A191505