A068799 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A068799

Ulam numbers such that n/2 is also an Ulam number.

%I #8 Mar 15 2024 16:52:12

%S 2,4,6,8,16,26,36,72,106,114,138,412,546,800,1966,2616,5162,6410,8236,

%T 27062,29784,177104,278256,342486,556126,664364,1388708,6833546,

%U 8622762,9734048

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

%F a(n) = 2 * A068791(n). - _Sean A. Irvine_, Mar 15 2024

%Y Cf. A002858, A068791.

%K easy,nonn

%O 1,1

%A _Naohiro Nomoto_, Mar 29 2002

%E More terms from _Jud McCranie_, Feb 12 2003