a(n) = Sum_{k=0..n} floor(sqrt(k))^4.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =19a(5) =35a(6) =51a(7) =67a(8) =83a(9) =164a(10) =245a(11) =326a(12) =407a(13) =488a(14) =569a(15) =650a(16) =906a(17) =1162a(18) =1418a(19) =1674a(20) =1930a(21) =2186a(22) =2442a(23) =2698a(24) =2954a(25) =3579a(26) =4204a(27) =4829a(28) =5454a(29) =6079