145552domain: NAppears in sequencesa(1)=1, a(n+1) = a(n) + spf(Sum_{i=1..n} a(i)), where spf=A020639 (smallest prime factor).at n=34A080180Dimension of space of equivariant linear maps from R^{n^3} to R^{n^3} under diagonal action of {-1, 1}^n.at n=22A370649E.g.f. A(x) satisfies A(x) = exp( x*((A(x) + A(-x))/2)^3 ).at n=7A385688