a(n+1) = n*a(n) + a(n-1) with a(0)=1, a(1)=0.
1, 0, 1, 2, 7, 30, 157, 972, 6961, 56660, 516901, 5225670, 57999271, 701216922
1 seqfan posts
Wed Jan 26 15:24:23 CET 2011 [seqfan] Experiment: period of a(n) mod p (after ditching rational expressions and linear recurrences)