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(A047926(n)-A091588(n))/2.
0

%I #12 Aug 02 2014 06:17:48

%S 0,0,0,1,2,5,15,43,127,383,1143,3423,10264,30785

%N (A047926(n)-A091588(n))/2.

%C A091588 remains mysterious, but A047926 is reasonably close to it.

%H F. J. van de Bult, D. C. Gijswijt, J. P. Linderman, N. J. A. Sloane and Allan Wilks, <a href="http://www.cs.uwaterloo.ca/journals/JIS/VOL10/Sloane/sloane55.html">A Slow-Growing Sequence Defined by an Unusual Recurrence</a>, J. Integer Sequences, Vol. 10 (2007), #07.1.2.

%H F. J. van de Bult, D. C. Gijswijt, J. P. Linderman, N. J. A. Sloane and Allan Wilks, A Slow-Growing Sequence Defined by an Unusual Recurrence [<a href="http://neilsloane.com/doc/gijs.pdf">pdf</a>, <a href="http://neilsloane.com/doc/gijs.ps">ps</a>].

%H <a href="/index/Ge#Gijswijt">Index entries for sequences related to Gijswijt's sequence</a>

%Y Cf. A090822, A047926, A091588.

%K nonn

%O 0,5

%A _N. J. A. Sloane_, Jun 01 2004