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%I #4 Mar 05 2013 13:11:23
%S 42,43,98,101,145,152,185,200,222,253,264,327,327,454,443,698,676,
%T 1187,1154,2177,2133,4180,4125,8220,8154,16345,16268,32651,32563,
%U 65330,65231,130766,130656,261727,261606,523749,523617,1047904
%N First differences are formed by interleaving {2^k - 1, k = 1, 2, 3, ...} and {11*k, k = 5, 4, 3, ...}.
%C A version of this was given as a puzzle somewhere.
%F Empirical g.f.: x*(48*x^6+34*x^4-x^3-113*x^2+x+42) / ((x-1)^3*(x+1)^2*(2*x^2-1)). - _Colin Barker_, Mar 05 2013
%Y Cf. A087098, A087099, A001068.
%K nonn
%O 1,1
%A Michael M. Taylor, Aug 09 2003
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