Triangle T(n,k) of rencontres numbers (number of permutations of n elements with k fixed points).
1, 0, 1, 1, 0, 1, 2, 3, 0, 1, 9, 8, 6, 0, 1, 44, 45, 20, 10, 0, 1, 265, 264, 135, 40, 15, 0, 1
1 seqfan posts
Thu Jul 14 11:31:20 CEST 2011 [seqfan] Change of signs in terms of A055137