Numbers k such that phi(2k+1) < phi(2k).

Terms

a(0) =157a(1) =262a(2) =367a(3) =412a(4) =472a(5) =487a(6) =577a(7) =682a(8) =787a(9) =877a(10) =892a(11) =907a(12) =997a(13) =1072a(14) =1207a(15) =1237a(16) =1312a(17) =1402a(18) =1522a(19) =1567a(20) =1627a(21) =1657a(22) =1732a(23) =1852a(24) =1942a(25) =2047a(26) =2062a(27) =2152a(28) =2194a(29) =2257