Self-convolution of A180711.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =11a(5) =18a(6) =28a(7) =42a(8) =61a(9) =88a(10) =124a(11) =168a(12) =227a(13) =302a(14) =394a(15) =510a(16) =653a(17) =826a(18) =1037a(19) =1290a(20) =1591a(21) =1952a(22) =2378a(23) =2876a(24) =3461a(25) =4144a(26) =4935a(27) =5850a(28) =6905a(29) =8114