199957

Appears in sequences

• Expansion of 1/((1-2x)(1-9x)(1-10x)(1-12x)).at n=4A028022
• Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=2, r=3, I={0,2}.at n=23A080006