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%I #7 Apr 13 2014 10:22:06
%S 1,4,576,518400,13168189440000,229442532802560000,
%T 437763136697395052544000000,40990389067797283140009984000000,
%U 1263377636044591724886240423994982400000000,92956902680071188234494975268405495542386262016000000000000
%N a(n) = ((n-th-prime - 1)!)^2
%C Except first three terms, sqrt(a(n)/400) is an integer, also sqrt(a(n+1/a(n)) is an integer. [From _Giovanni Teofilatto_, May 16 2010]
%t ((Prime[Range[10]]-1)!)^2 (* _Harvey P. Dale_, Apr 13 2014 *)
%Y Cf. A177771.
%K easy,nonn
%O 1,2
%A _Giovanni Teofilatto_, May 15 2010
%E One more term from _Harvey P. Dale_, Apr 13 2014
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