4th column of number array A083075.

Terms

a(0) =1a(1) =63a(2) =229a(3) =547a(4) =1065a(5) =1831a(6) =2893a(7) =4299a(8) =6097a(9) =8335a(10) =11061a(11) =14323a(12) =18169a(13) =22647a(14) =27805a(15) =33691a(16) =40353a(17) =47839a(18) =56197a(19) =65475a(20) =75721a(21) =86983a(22) =99309a(23) =112747a(24) =127345a(25) =143151a(26) =160213a(27) =178579a(28) =198297a(29) =219415