Sum of a(n) terms of 1/k^(4/5) first exceeds n.

Terms

a(0) =1a(1) =2a(2) =4a(3) =7a(4) =14a(5) =24a(6) =40a(7) =63a(8) =95a(9) =140a(10) =201a(11) =281a(12) =384a(13) =516a(14) =682a(15) =888a(16) =1141a(17) =1449a(18) =1820a(19) =2263a(20) =2789a(21) =3408a(22) =4133a(23) =4976a(24) =5951a(25) =7074a(26) =8360a(27) =9826a(28) =11492a(29) =13376