Convolution of natural numbers >= 2 and natural numbers >= 3.

Terms

a(0) =6a(1) =17a(2) =34a(3) =58a(4) =90a(5) =131a(6) =182a(7) =244a(8) =318a(9) =405a(10) =506a(11) =622a(12) =754a(13) =903a(14) =1070a(15) =1256a(16) =1462a(17) =1689a(18) =1938a(19) =2210a(20) =2506a(21) =2827a(22) =3174a(23) =3548a(24) =3950a(25) =4381a(26) =4842a(27) =5334a(28) =5858a(29) =6415