91962domain: NAppears in sequencesa(1)=1, a(2)=2, a(n)=a(n-1)+floor(a(n-2)*a(n-1)/(a(n-2)+a(n-1))).at n=34A173090Number of partitions of 5n such that cn(1,5) = cn(4,5) = cn(2,5) = cn(3,5) < cn(0,5).at n=17A202086