a(n) = cpg(n, 3) + cpg(n, 4) + ... + cpg(n, n) where cpg(n, m) is the m-th n-th-order centered polygonal number.

A257051

a(n) = cpg(n, 3) + cpg(n, 4) + ... + cpg(n, n) where cpg(n, m) is the m-th n-th-order centered polygonal number.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =10a(4) =38a(5) =98a(6) =208a(7) =390a(8) =670a(9) =1078a(10) =1648a(11) =2418a(12) =3430a(13) =4730a(14) =6368a(15) =8398a(16) =10878a(17) =13870a(18) =17440a(19) =21658a(20) =26598a(21) =32338a(22) =38960a(23) =46550a(24) =55198a(25) =64998a(26) =76048a(27) =88450a(28) =102310a(29) =117738

External references