Partial sums of A038580.

Terms

a(0) =5a(1) =16a(2) =47a(3) =106a(4) =233a(5) =412a(6) =689a(7) =1020a(8) =1451a(9) =2050a(10) =2759a(11) =3678a(12) =4741a(13) =5894a(14) =7191a(15) =8714a(16) =10501a(17) =12348a(18) =14569a(19) =16950a(20) =19427a(21) =22176a(22) =25177a(23) =28436a(24) =32073a(25) =36016a(26) =40107a(27) =44380a(28) =48777a(29) =53326