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a(n) = A277715(n) / 3.
2

%I #8 Oct 30 2016 13:47:54

%S 3,7,15,31,63,127,219,255,291,439,511,583,819,879,1023,1167,1443,1639,

%T 1747,1759,1915,2047,2115,2335,2887,3187,3279,3339,3495,3519,3831,

%U 4095,4231,4671,5043,5775,5995,6375,6559,6679,6991,7039,7323,7663,8191,8463,8931,9343,10087,10515,11551,11991,12531,12751,12827,13119,13359,13983,14079,14647,15327,16383

%N a(n) = A277715(n) / 3.

%H Antti Karttunen, <a href="/A277716/b277716.txt">Table of n, a(n) for n = 1..444</a>

%F a(n) = A277715(n) / 3.

%o (Scheme) (define (A277716 n) (/ (A277715 n) 3))

%Y Cf. A277715.

%Y Cf. A000225 (seems to be a subsequence from 3 onward).

%K nonn

%O 1,1

%A _Antti Karttunen_, Oct 29 2016