60375domain: NAppears in sequencesa(n) = Sum_{k=0..floor(n/2)} Stirling2(n-k,k) * 3^k.at n=11A097342a(n) = 3*(3*n+1)*(9*n+8)/2.at n=38A304504G.f.: Sum_{n>=0} (n+1)*(n+2)*(n+3)*(n+4)/4! * x^n * (1 + x^n)^n.at n=24A326005Number of maximal subsets of {1..n} containing no sums of distinct elements.at n=34A326498