190345

Appears in sequences

• (Prime(prime(n))^2+1)/2.at n=29A092773
• a(n) = hypergeom([-2*n-1, 1/2], [2], 4) + (2*n+1)*hypergeom([-n+1/2, -n], [2], 4).at n=6A273019
• a(n) = Sum_{k=0..n} C(n,k)*((-1)^n*(C(k,n-k)-C(k,n-k-1))+C(n-k,k+1)).at n=13A273020
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of e.g.f.: exp(Product_{j=1..n} 1/(1-x^j) - 1).at n=52A294212
• E.g.f.: exp(1/((1-x)*(1-x^2)) - 1).at n=7A294213