login
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
OFFSET
2,2
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: A322556 A295413 A202799 * A239365 A277262 A226358
KEYWORD
nonn
AUTHOR
Hugo Pfoertner, Aug 15 2006
STATUS
approved