Rectified 5-cell numbers: the coefficient of x^{2n-2} in (1+x+x^2+ ... + x^{n-1})^5.

Terms

a(0) =0a(1) =1a(2) =10a(3) =45a(4) =135a(5) =320a(6) =651a(7) =1190a(8) =2010a(9) =3195a(10) =4840a(11) =7051a(12) =9945a(13) =13650a(14) =18305a(15) =24060a(16) =31076a(17) =39525a(18) =49590a(19) =61465a(20) =75355a(21) =91476a(22) =110055a(23) =131330a(24) =155550a(25) =182975a(26) =213876a(27) =248535a(28) =287245a(29) =330310