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%I #12 Mar 21 2020 04:07:43
%S 1,2,6,25,125,755,5285,42286,380578,3805780,41863584,502363009,
%T 6530719126,91430067771,1371451016567,21943216265073,373034676506249,
%U 6714624177112491,127577859365137340,2551557187302746813
%N a(n) = floor(exp(1/21) * n!).
%t Floor[Exp[1/21] Range[20]!] (* _Harvey P. Dale_, Jan 22 2015 *)
%Y Cf. A021025 (1/21).
%K nonn,easy
%O 1,2
%A _Simon Plouffe_
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