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, 0), (0, 1, -1), (0, 1, 1), (1, 0, 0), (1, 1, -1)}.
A150219
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, 0), (0, 1, -1), (0, 1, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =82a(5) =321a(6) =1315a(7) =5459a(8) =23101a(9) =99239a(10) =430761a(11) =1885010a(12) =8314081a(13) =36891946a(14) =164646168a(15) =738475180a(16) =3325764202a(17) =15034489911a(18) =68193338795a(19) =310244886356
External references
- oeis: A150219