A068791 - OEIS

%I #17 May 14 2017 17:07:26

%S 1,2,3,4,8,13,18,36,53,57,69,206,273,400,983,1308,2581,3205,4118,

%T 13531,14892,88552,139128,171243,278063,332182,694354,3416773,4311381,

%U 4867024

%N Ulam numbers such that 2*n is also an Ulam number.

%Y Cf. A002858, A068799.

%K more,nonn

%O 1,2

%A _Naohiro Nomoto_, Mar 29 2002

%E More terms from _Jud McCranie_, Feb 12 2003