A068946 Number of digits in A068943.

1, 1, 2, 6, 22, 83, 316, 1213, 4667, 17992, 69509, 269058, 1043346, 4052518, 15764358, 61408219, 239510633, 935245088, 3655841616, 14304538696, 56021145629, 219579741115, 861327333405, 3381084681442, 13281106066320

Offset

1,3

Links

Table of n, a(n) for n=1..25.

Example

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

Prog

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

Crossrefs

a(n) = length(A068943(n))

Sequence in context: A150234 A150235 A150236 * A150237 A122449 A150238

Adjacent sequences: A068943 A068944 A068945 * A068947 A068948 A068949

Keyword

nonn,base

Author

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

Extensions

More terms from Benoit Cloitre, Mar 11 2002

Status

approved