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, -1, -1), (-1, 0, 1), (0, 1, 0), (1, 0, 0), (1, 1, -1)}.
A149882
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, -1, -1), (-1, 0, 1), (0, 1, 0), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =14a(4) =43a(5) =147a(6) =523a(7) =1932a(8) =7289a(9) =28034a(10) =110057a(11) =438969a(12) =1774737a(13) =7252025a(14) =29898867a(15) =124323401a(16) =520995759a(17) =2198354226a(18) =9332207929a(19) =39825314924a(20) =170784974678a(21) =735750134895
External references
- oeis: A149882