This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A077046 #13 Mar 26 2016 16:34:15 %S A077046 0,1,3,19,155,1751,24017,398567,7635987,167729959,4123838279, %T A077046 112835748609,3386455204288,110976634957761,3932912125462725, %U A077046 150186639579545295,6137695417757646851,267654541150392845543,12391407810082341898091,607584722159224093306229 %N A077046 Doubly restricted composition numbers: number of compositions of [n^2/2] into exactly n positive integers each strictly less than n. %H A077046 Alois P. Heinz, <a href="/A077046/b077046.txt">Table of n, a(n) for n = 1..70</a> %H A077046 <a href="/index/Com#comp">Index entries for sequences related to compositions</a> %F A077046 a(n) = A077042(n-1, n). %F A077046 a(n) ~ exp(-1)*sqrt(6/Pi)*n^(n-3/2). - _Vaclav Kotesovec_, Mar 26 2016 %e A077046 a(3) = 3 since the compositions of [3^2/2]=4 into exactly 3 positive integers each strictly less than 3 are: 1+1+2, 1+2+1 and 2+1+1. %Y A077046 Cf. A077042, A077045, A077047, A077048. %K A077046 nonn %O A077046 1,3 %A A077046 _Henry Bottomley_, Oct 22 2002