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 A191651 Ratio A191650(n+1)/A191650(n). 1
 2, 2, 2, 4, 6, 9, 15, 20, 28, 42, 60, 90, 135, 195, 286, 418, 608, 896, 1316, 1927, 2829, 4140, 6060, 8888, 13024, 19092, 27993, 41013, 60102, 88086, 129082, 189196, 277298, 406385, 595595, 872872, 1279224, 1874826, 2747700, 4026950, 5901823, 8649495 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS R. H. Hardin, Table of n, a(n) for n = 1..50 FORMULA Empirical: a(n)=a(n-1)+a(n-3)-a(n-4)+a(n-5)+a(n-6)-a(n-9) - R. H. Hardin, Jun 13 2011 Empirical g.f.: x*(2 + 2*x^4 + x^5 - x^7 - x^8) / ((1 - x - x^3)*(1 + x^4 - x^6)). - Colin Barker, May 04 2018 CROSSREFS Sequence in context: A241576 A306749 A272371 * A010558 A060827 A188288 Adjacent sequences:  A191648 A191649 A191650 * A191652 A191653 A191654 KEYWORD nonn AUTHOR R. H. Hardin, Jun 10 2011 STATUS approved

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Last modified February 18 12:10 EST 2020. Contains 332018 sequences. (Running on oeis4.)