50389

Appears in sequences

• a(n) = Sum_{i=1..n} i^(n - i) + (-1)^(n - i)*(n - i)^i.at n=10A062812
• Numbers n such that 2*n*k(n) is rational but not an integer, where k(n) is sum of successive remainders when computing the Euclidean algorithm for (1, 1/sqrt(n)) as defined in A086378 (MuPAD program is given there); numbers belonging to A086378 but not to A088900.at n=28A087414
• Integers k for which {prime(1), prime(2), ..., prime(k)} (mod 4) is biased towards 1.at n=10A096628
• Number of 3 X n 0..1 arrays with rows nondecreasing and antidiagonals unimodal.at n=40A224134
• Number of rooted identity trees with n nodes and exactly 4 subtrees from the root.at n=11A227808
• Expansion of Sum_{k>=0} (x/(1 - x))^(k^3).at n=20A280351
• a(n) = Sum_{k=0..floor(4*n/11)} binomial(k,4*n-11*k).at n=54A389717