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%I #8 Apr 20 2021 19:29:21
%S 1,2,6,25,129,777,5442,43543,391895,3918955,43108507,517302088,
%T 6724927152,94148980136,1412234702043,22595755232690,384127838955741,
%U 6914301101203342,131371720922863503,2627434418457270066
%N a(n) = floor(exp(1/13)*n!).
%t Floor[Exp[1/13]Range[20]!] (* _Harvey P. Dale_, May 26 2020 *)
%K nonn
%O 1,2
%A _Simon Plouffe_
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