26074

Appears in sequences

• a(1) = 0, a(2) = 4, a(n) = a(n-1) + a(n-2) - 1.at n=21A187890
• Numbers n such that prime(n) + reversal(prime(n)) is a square.at n=12A227371
• Triangle read by rows, T(n,k) = !n + (k-1)*(n-1)!, with n>=1, 1<=k<=n; Position of the first n-letter permutation beginning with number k in the list of lexicographically sorted permutations A030299.at n=32A237450