Number of 5-element subsets that can be chosen from {1,2,...,10*n+5} having element sum 25*n+15.

Terms

a(0) =1a(1) =141a(2) =1394a(3) =5910a(4) =17053a(5) =39361a(6) =78602a(7) =141702a(8) =236833a(9) =373309a(10) =561704a(11) =813722a(12) =1142341a(13) =1561651a(14) =2087034a(15) =2734970a(16) =3523243a(17) =4470721a(18) =5597592a(19) =6925112a(20) =8475873a(21) =10273519a(22) =12343044a(23) =14710482a(24) =17403231a(25) =20449711a(26) =23879724a(27) =27724080a(28) =32014983a(29) =36785631