a(n) = a(n-1)*(3a(n-1) + 1)/2 with a(1) = 1.A059406a(n) = a(n-1)*(3a(n-1) + 1)/2 with a(1) = 1.Terms a(0) =1a(1) =2a(2) =7a(3) =77a(4) =8932a(5) =119675402External referencesoeis: A059406