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, 0, 1), (-1, 1, 1), (0, -1, 1), (0, 1, -1), (1, 1, 1)}.
A149772
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, 0, 1), (-1, 1, 1), (0, -1, 1), (0, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =77a(5) =319a(6) =1375a(7) =5929a(8) =26113a(9) =115305a(10) =514955a(11) =2306707a(12) =10404785a(13) =47061877a(14) =213869821a(15) =974273885a(16) =4453345549a(17) =20398856593a(18) =93680104321a(19) =431003385037
External references
- oeis: A149772