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%I #6 May 25 2024 21:08:43
%S 1,3,10,40,204,1227,8591,68729,618567,6185670,68042371,816508457,
%T 10614609952,148604539330,2229068089950,35665089439210,
%U 606306520466578,10913517368398413,207356829999569855,4147136599991397105
%N a(n) = floor(exp(8/15)*n!).
%t Floor[Exp[8/15] Range[20]!] (* _Wesley Ivan Hurt_, May 25 2024 *)
%K nonn
%O 1,2
%A _Simon Plouffe_