On Wed, 19 Aug 2009, N. J. A. Sloane wrote: > %I A151959 > %S A151959 0,53955,64308654,62964 a(1) = 0 a(2) = 53955 a(3) = 64308654 a(4) = 61974 a(5) = 86420987532 a(7) = 420876 a(8) = 7509843 a(14) = 753098643 No other cycle lengths up to at least 23 digits. -- Joseph S. Myers jsm at polyomino.org.uk