Numbers k such that 1/(5-s(k)) is an integer where s(k) = Sum_{i=1..k} 1/2^floor(sqrt(i)).

Terms

a(0) =21a(1) =34a(2) =50a(3) =69a(4) =90a(5) =113a(6) =138a(7) =165a(8) =194a(9) =226a(10) =261a(11) =298a(12) =337a(13) =378a(14) =421a(15) =466a(16) =513a(17) =562a(18) =613a(19) =666a(20) =721a(21) =778a(22) =837a(23) =898a(24) =962a(25) =1029a(26) =1098a(27) =1169a(28) =1242a(29) =1317