Sum of squares until integer log : sopfr(n). Or also, s(s+1)(2s+1)/6 where s=sopfr(n).

Terms

a(0) =0a(1) =5a(2) =14a(3) =30a(4) =55a(5) =55a(6) =140a(7) =91a(8) =91a(9) =140a(10) =506a(11) =140a(12) =819a(13) =285a(14) =204a(15) =204a(16) =1785a(17) =204a(18) =2470a(19) =285a(20) =385a(21) =819a(22) =4324a(23) =285a(24) =385a(25) =1240a(26) =285a(27) =506a(28) =8555a(29) =385