Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 0), (-1, 0, 1), (0, -1, 1), (1, 1, -1), (1, 1, 1)}.
A149787
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 0), (-1, 0, 1), (0, -1, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =81a(5) =361a(6) =1623a(7) =7349a(8) =34447a(9) =160801a(10) =755761a(11) =3603957a(12) =17174743a(13) =82108157a(14) =395772425a(15) =1907259523a(16) =9210295767a(17) =44696787277a(18) =216928488517
External references
- oeis: A149787