n is equal to the number of 1's in all numbers <= n written in base 8.

Terms

a(0) =1a(1) =8177a(2) =8178a(3) =8179a(4) =8180a(5) =8181a(6) =8182a(7) =8183a(8) =8184a(9) =8192a(10) =8193a(11) =49137a(12) =49138a(13) =49139a(14) =49140a(15) =49141a(16) =49142a(17) =49143a(18) =49144a(19) =90112a(20) =90113a(21) =322096a(22) =1048576a(23) =1048577a(24) =1056753a(25) =1056754a(26) =1056755a(27) =1056756a(28) =1056757a(29) =1056758