593880

Appears in sequences

• a(n) is the number of subsets of {1,...,n} containing no solutions to x+y=z with x and y distinct (one version of "sum-free subsets").at n=29A085489
• Expansion of e.g.f. (1/x) * Series_Reversion( x/(1 - x*log(1-x))^2 ).at n=7A377390