login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

a(n) = floor(n!*(e - 1/24)).
0

%I #5 Oct 13 2024 07:06:19

%S 2,2,5,16,64,321,1927,13490,107921,971290,9712901,106841912,

%T 1282102945,16667338286,233342736005,3500141040076,56002256641217,

%U 952038362900690,17136690532212421,325597120112036000,6511942402240720001,136750790447055120022,3008517389835212640485

%N a(n) = floor(n!*(e - 1/24)).

%D R. K. Guy, Unsolved Problems in Number Theory, Springer, 1st edition, 1981. See section E11.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/SchursProblem.html">Schur's Problem</a>.

%t a[n_]:=Floor[n!(E-1/24)]; Array[a,23,0]

%Y Cf. A000522, A370973.

%K nonn,easy

%O 0,1

%A _Stefano Spezia_, Oct 12 2024