1045800

Appears in sequences

• Partition of positive numbers into shortest possible groups (1), (2,3), (4,5,6), (7,8), ... such that a(n) = the sum of the terms of the n-th group is a multiple of a(n-1).at n=8A160275
• E.g.f. A(x) satisfies A(x) = 1 + log(1 + x^2*A(x)^2)/x.at n=7A218653