Number of positive solutions to (x_1)^2 + (x_2)^2 + ... + (x_5)^2 <= n^2.

Terms

a(0) =6a(1) =51a(2) =177a(3) =547a(4) =1348a(5) =2958a(6) =5574a(7) =10084a(8) =16974a(9) =27450a(10) =41970a(11) =62671a(12) =90216a(13) =128082a(14) =175867a(15) =238018a(16) =316373a(17) =414998a(18) =534094a(19) =682144a(20) =859705a(21) =1075165a(22) =1326551a(23) =1627896a(24) =1976582a(25) =2390057a(26) =2862607a(27) =3411273a(28) =4039483a(29) =4760419