72222

Appears in sequences

• Number of permutations in S_{n+2} containing an increasing subsequence of length n.at n=19A217200
• Members of A014574 with sum of prime factors (with multiplicity) also in A014574.at n=42A349455
• Triangular array T(n,k), read by rows: coefficients of strong divisibility sequence of polynomials p(1,x) = 1, p(2,x) = 2 + 5*x, p(n,x) = u*p(n-1,x) + v*p(n-2,x) for n >= 3, where u = p(2,x), v = 1 - 2*x - x^2.at n=38A367299