Column 4 of array in A226513.

Terms

a(0) =75a(1) =308a(2) =807a(3) =1704a(4) =3155a(5) =5340a(6) =8463a(7) =12752a(8) =18459a(9) =25860a(10) =35255a(11) =46968a(12) =61347a(13) =78764a(14) =99615a(15) =124320a(16) =153323a(17) =187092a(18) =226119a(19) =270920a(20) =322035a(21) =380028a(22) =445487a(23) =519024a(24) =601275a(25) =692900a(26) =794583a(27) =907032a(28) =1030979a(29) =1167180