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, 0), (-1, 1, 0), (0, 1, 1), (1, 0, -1), (1, 0, 1)}.
A150613
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, 0), (-1, 1, 0), (0, 1, 1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =112a(5) =478a(6) =2105a(7) =9484a(8) =43245a(9) =199431a(10) =929300a(11) =4361745a(12) =20586755a(13) =97701197a(14) =465803681a(15) =2228618096a(16) =10697330605a(17) =51501214062a(18) =248561101771
External references
- oeis: A150613