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

A257052

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

Terms

    a(0) =0a(1) =0a(2) =0a(3) =10a(4) =44a(5) =123a(6) =274a(7) =530a(8) =930a(9) =1519a(10) =2348a(11) =3474a(12) =4960a(13) =6875a(14) =9294a(15) =12298a(16) =15974a(17) =20415a(18) =25720a(19) =31994a(20) =39348a(21) =47899a(22) =57770a(23) =69090a(24) =81994a(25) =96623a(26) =113124a(27) =131650a(28) =152360a(29) =175419

External references