53540

Appears in sequences

• Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=1, r=4, I={3}.at n=18A079975
• a(n) = n^3 + 2*n^2 + 4*n + 1.at n=37A270867
• G.f.: Product_{k>=1, j>=1} (1 + x^(k*j))^2 / (1 - x^(k*j)).at n=13A320244
• a(n) is the number of terms in A330418 with exactly n digits.at n=10A330419