Number of nonempty subsets of {1..n} whose elements have an odd root mean square.

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =3a(5) =3a(6) =6a(7) =6a(8) =7a(9) =9a(10) =16a(11) =26a(12) =41a(13) =85a(14) =142a(15) =254a(16) =461a(17) =825a(18) =1454a(19) =2506a(20) =4535a(21) =7987a(22) =14352a(23) =26178a(24) =47861a(25) =87945a(26) =162486a(27) =304864a(28) =565217a(29) =1064529