login

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”).

a(n) = A087745(n+1).
0

%I #18 Jul 10 2017 02:53:09

%S 1,3,3,5,5,15,15,17,17,51,51,85,85,255,255,257,257,771,771,1285,1285,

%T 3855,3855,4369,4369,13107,13107,21845,21845,65535,65535,65537,65537,

%U 196611,196611,327685,327685,983055,983055,1114129,1114129

%N a(n) = A087745(n+1).

%C Essentially a duplicate of A087745.

%C Mitrinovic's triangles A049458, A049460, A051339, A051380 and triangle of Stirling numbers of first kind (A008275) mod 2 converted to decimal.

%C See also A001317 = [1, 3, 5, 15, 17, ...].

%Y Cf. A001317, A008275, A049458, A049460, A051339, A051380.

%K base,easy,nonn,less

%O 0,2

%A _Philippe Deléham_, Oct 02 2003

%E Edited by _Omar E. Pol_ and _N. J. A. Sloane_, Dec 26 2008