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A232971 G.f.: (1-5*x+3*x^2+x^3)/(1-7*x+10*x^2+x^3-x^4). 0

%I

%S 1,2,7,29,132,629,3061,15034,74131,366145,1809732,8947577,44243705,

%T 218786578,1081931151,5350356149,26458638660,130843764557,

%U 647051540301,3199814854026,15823803449275,78252267828921,386975076995972,1913678872087345,9463572870272049,46799498561863842,231434057435235031

%N G.f.: (1-5*x+3*x^2+x^3)/(1-7*x+10*x^2+x^3-x^4).

%D M. Dziemianczuk, Counting Lattice Paths With Four Types of Steps, Graphs and Combinatorics, September 2013, DOI 10.1007/s00373-013-1357-1.

%K nonn

%O 0,2

%A _N. J. A. Sloane_, Dec 05 2013

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Last modified February 19 08:57 EST 2019. Contains 320309 sequences. (Running on oeis4.)