Partial sums of the tricapped prism numbers A005920.

Terms

a(0) =1a(1) =10a(2) =43a(3) =125a(4) =290a(5) =581a(6) =1050a(7) =1758a(8) =2775a(9) =4180a(10) =6061a(11) =8515a(12) =11648a(13) =15575a(14) =20420a(15) =26316a(16) =33405a(17) =41838a(18) =51775a(19) =63385a(20) =76846a(21) =92345a(22) =110078a(23) =130250a(24) =153075a(25) =178776a(26) =207585a(27) =239743a(28) =275500a(29) =315115