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%I #5 Aug 10 2015 07:31:31
%S 1,0,0,1,0,1,2,3,3,6,8,12,19,29,45,69,106,164,254,395,615,960,1500,
%T 2346,3672,5751,9012,14129,22159,34768,54578,85730,134763,212017,
%U 333860,526226,830230,1311088,2072264,3277910,5188460,8217094
%N First differences of A261091: a(n) = A261091(n+1) - A261091(n).
%F a(n) = A261091(n+1) - A261091(n).
%o (Scheme) (define (A261090 n) (- (A261091 (+ n 1)) (A261091 n)))
%Y Cf. A261091.
%K nonn
%O 0,7
%A _Antti Karttunen_, Aug 09 2015