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%I #12 Jan 30 2023 08:23:35
%S 25,841,32041,1585081,101586241,8229936961,823010025601,
%T 99584412681601,14340158060659201,2423486749613529601,
%U 475003403490910694401,106875765794608626816001,27360196043576729389056001,7907096656596520292861952001,2561899316737326995063771136001
%N a(n) = (n!/4-1)^2.
%C These are maximal values y^2 in solutions to x^2-y^2=n! which are ((n! + 4)/4)^2 - ((n! - 4)/4)^2 = n!.
%F a(n) = (A139174(n))^2.
%t Table[((n! - 4)/4)^2, {n, 4, 20}]
%Y Cf. A139151 (associated x).
%K nonn,easy
%O 4,1
%A _Artur Jasinski_, Mar 31 2012
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