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, -1), (-1, 1, 1), (0, 1, 1), (1, -1, 0)}.
A148373
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, -1), (-1, 1, 1), (0, 1, 1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =42a(6) =147a(7) =456a(8) =1632a(9) =5436a(10) =20292a(11) =70488a(12) =269689a(13) =969337a(14) =3773909a(15) =13915965a(16) =54938959a(17) =206707162a(18) =824983630a(19) =3154624846a(20) =12707736425a(21) =49236197889a(22) =199856276902a(23) =783059335216
External references
- oeis: A148373