A068946 - OEIS

%I #5 Mar 30 2012 18:38:56

%S 1,1,2,6,22,83,316,1213,4667,17992,69509,269058,1043346,4052518,

%T 15764358,61408219,239510633,935245088,3655841616,14304538696,

%U 56021145629,219579741115,861327333405,3381084681442,13281106066320

%N Number of digits in A068943.

%e a(5)=22 since A068943(5)=2524286414780230533120.

%o (PARI) for(n=1,20,print1(ceil((sum(m=1,n,binomial(m+n-2,m-1)*log(n-m+1)))/log(10)),","))

%Y a(n) = length(A068943(n))

%K nonn,base

%O 1,3

%A Francois Jooste (phukraut(AT)hotmail.com), Mar 10 2002

%E More terms from _Benoit Cloitre_, Mar 11 2002