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 A068946 #5 Mar 30 2012 18:38:56 %S A068946 1,1,2,6,22,83,316,1213,4667,17992,69509,269058,1043346,4052518, %T A068946 15764358,61408219,239510633,935245088,3655841616,14304538696, %U A068946 56021145629,219579741115,861327333405,3381084681442,13281106066320 %N A068946 Number of digits in A068943. %e A068946 a(5)=22 since A068943(5)=2524286414780230533120. %o A068946 (PARI) for(n=1,20,print1(ceil((sum(m=1,n,binomial(m+n-2,m-1)*log(n-m+1)))/log(10)),",")) %Y A068946 a(n) = length(A068943(n)) %K A068946 nonn,base %O A068946 1,3 %A A068946 Francois Jooste (phukraut(AT)hotmail.com), Mar 10 2002 %E A068946 More terms from _Benoit Cloitre_, Mar 11 2002