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, -1), (0, 1, 1), (1, -1, 1)}.
A148896
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, -1), (0, 1, 1), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =31a(5) =103a(6) =399a(7) =1501a(8) =6131a(9) =24130a(10) =100281a(11) =413377a(12) =1754755a(13) =7363170a(14) =31742643a(15) =136131696a(16) =592919234a(17) =2571727237a(18) =11326703645a(19) =49697330488a(20) =220292950842a(21) =974794333144
External references
- oeis: A148896