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A121348 Difference between (n!)^2 and the next smaller factorial. 2


%S 1,12,456,9360,155520,21772800,1146700800,44503603200,11860515072000,

%T 1237663494144000,107797432393728000,36342886035456000000,

%U 6476053728774389760000,1089563850990959984640000

%N Difference between (n!)^2 and the next smaller factorial.

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

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

%K nonn

%O 2,2

%A _Hugo Pfoertner_, Aug 15 2006

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Last modified September 21 07:28 EDT 2021. Contains 347596 sequences. (Running on oeis4.)