-4241

Appears in sequences

• Irregular triangle read by rows: T(n,k) is the k-th generalized Eulerian number of order n and degree 2, for n >= 1 (the rows start at k=1).at n=40A211232
• Values of n such that L(2) and N(2) are both prime, where L(k) = (n^2+n+1)*2^(2*k) + (2*n+1)*2^k + 1, N(k) = (n^2+n+1)*2^k + n.at n=40A226922
• a(n) = n! * Sum_{k=0..floor(n/2)} (-1)^k / (n-2*k)!.at n=7A337749