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A074703 a(n) = n^2*a(n-1)+1, a(1)=0. 0
0, 1, 10, 161, 4026, 144937, 7101914, 454522497, 36816322258, 3681632225801, 445477499321922, 64148759902356769, 10841140423498293962, 2124863523005665616553, 478094292676274763724426 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..15.

FORMULA

a(n) = round(n!^2*(BesselI(0, 2)-2)).

CROSSREFS

Cf. A006040, A073701.

Sequence in context: A112125 A090374 A034724 * A190903 A064747 A054688

Adjacent sequences:  A074700 A074701 A074702 * A074704 A074705 A074706

KEYWORD

easy,nonn

AUTHOR

Vladeta Jovovic, Sep 03 2002

STATUS

approved

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Last modified June 19 13:56 EDT 2013. Contains 226411 sequences.