227601

Appears in sequences

• Sum of numbers that can be written as t*n + u*(n+1) for nonnegative integers t,u in exactly two ways.at n=17A076455
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where T(n,k) = Sum_{j=0..n} 2^j * binomial(n,j)^k.at n=59A336203
• G.f.: Sum_{k>=0} x^(k*(k+1)) * Product_{j=1..k} 1/(1 - x^j)^3.at n=36A376708