a(n) = Sum_{i=0..n} A000129(i)^3.

Terms

a(0) =0a(1) =1a(2) =9a(3) =134a(4) =1862a(5) =26251a(6) =369251a(7) =5196060a(8) =73113372a(9) =1028784997a(10) =14476099149a(11) =203694183170