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), (-1, 0, 0), (0, 1, 0), (1, -1, -1), (1, -1, 1)}.
A148246
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), (-1, 0, 0), (0, 1, 0), (1, -1, -1), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =13a(5) =36a(6) =120a(7) =389a(8) =1305a(9) =4343a(10) =15400a(11) =55281a(12) =200856a(13) =739968a(14) =2760315a(15) =10296944a(16) =38804152a(17) =148302743a(18) =570811519a(19) =2207354724a(20) =8597327712a(21) =33619658081a(22) =131780667660a(23) =519451646838
External references
- oeis: A148246