Pyramid game person numbers that have integer solutions.

Terms

a(0) =7a(1) =79a(2) =191a(3) =407a(4) =631a(5) =991a(6) =1327a(7) =1831a(8) =2279a(9) =2927a(10) =3487a(11) =4279a(12) =4951a(13) =5887a(14) =6671a(15) =7751a(16) =8647a(17) =9871a(18) =10879a(19) =12247a(20) =13367a(21) =14879a(22) =16111a(23) =17767a(24) =19111a(25) =20911a(26) =22367a(27) =24311a(28) =25879a(29) =27967