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A121348 Difference between (n!)^2 and the next smaller factorial. 2
1, 12, 456, 9360, 155520, 21772800, 1146700800, 44503603200, 11860515072000, 1237663494144000, 107797432393728000, 36342886035456000000, 6476053728774389760000, 1089563850990959984640000 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..15.

EXAMPLE

a(3)=12 because the difference between (3!)^2=36 and the next smaller factorial 4!=24 is 12.

CROSSREFS

Cf. A121347 [Largest number k such that (n!)^2-k!>0].

Sequence in context: A092704 A295413 A202799 * A239365 A277262 A226358

Adjacent sequences:  A121345 A121346 A121347 * A121349 A121350 A121351

KEYWORD

nonn

AUTHOR

Hugo Pfoertner, Aug 15 2006

STATUS

approved

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Last modified December 18 18:49 EST 2018. Contains 318243 sequences. (Running on oeis4.)