a(0) = 0, a(n) = Sum_{0<d|n, n/d odd} d^4 for n > 0.

Terms

a(0) =0a(1) =1a(2) =16a(3) =82a(4) =256a(5) =626a(6) =1312a(7) =2402a(8) =4096a(9) =6643a(10) =10016a(11) =14642a(12) =20992a(13) =28562a(14) =38432a(15) =51332a(16) =65536a(17) =83522a(18) =106288a(19) =130322a(20) =160256a(21) =196964a(22) =234272a(23) =279842a(24) =335872a(25) =391251a(26) =456992a(27) =538084a(28) =614912a(29) =707282