-741

Appears in sequences

• First order recursion: a(0)=1; a(n) = sigma(1,n) - a(n-1).at n=61A083238
• Numerator of Bernoulli(n, -6/7).at n=3A158583
• a(n) = Sum_{k=1..n} (-1)^(k+1) * floor(n/(2*k-1))^k.at n=32A350167
• G.f.: Sum_{n=-oo..+oo} x^(n*(n+1)/2) * C(x)^(4*n-6), where C(x) = 1 + x*C(x)^2 is the g.f. of the Catalan numbers (A000108).at n=6A355864