3625081

Properties

Appears in sequences

• a(1)=2; for n >= 2, (2n+1)^3*a(n) = 32n^3*a(n-1) + (21n^3 + 22n^2 + 8n + 1)*binomial(2n-1,n)^4.at n=3A176477
• Number of permutations of [n] having no substring [k,k+1,k+2,k+3,k+4].at n=10A370383
• Prime numbersat n=258448