a(n) = n^3+n for odd n, (n^3+n)*3/2 for even n: Row sums of A093915.

Terms

a(0) =2a(1) =15a(2) =30a(3) =102a(4) =130a(5) =333a(6) =350a(7) =780a(8) =738a(9) =1515a(10) =1342a(11) =2610a(12) =2210a(13) =4137a(14) =3390a(15) =6168a(16) =4930a(17) =8775a(18) =6878a(19) =12030a(20) =9282a(21) =16005a(22) =12190a(23) =20772a(24) =15650a(25) =26403a(26) =19710a(27) =32970a(28) =24418a(29) =40545