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, 1, 0), (-1, 1, 1), (1, 0, -1), (1, 0, 1)}.
A149313
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, 1, 0), (-1, 1, 1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =50a(5) =166a(6) =768a(7) =2805a(8) =13480a(9) =52372a(10) =253086a(11) =1014952a(12) =4972454a(13) =20522912a(14) =100746480a(15) =422879723a(16) =2089336522a(17) =8913557440a(18) =44076611636a(19) =190016718610a(20) =942914925376
External references
- oeis: A149313