a(n)=a(n-1)+sum of digits(a(n-1))*sum of digits(a(n-2)). 1, 1, 2, 4, 12, 24, 42, 78, 168, 393, 618, 843, 1068, 1293, 1518, 1743, 1968, 2328
1 seqfan posts