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, 0), (1, -1, 1), (1, 0, 0)}.
A148181
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, 0), (1, -1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =28a(6) =92a(7) =251a(8) =888a(9) =2597a(10) =9537a(11) =29203a(12) =109909a(13) =349642a(14) =1347960a(15) =4412258a(16) =17254200a(17) =57702511a(18) =228126260a(19) =776452797a(20) =3103037189a(21) =10722616957a(22) =43192929605a(23) =151123294126a(24) =612533426234
External references
- oeis: A148181