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, 0, 1), (0, 1, -1), (1, -1, -1), (1, 0, 1)}.
A148812
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, 0, 1), (0, 1, -1), (1, -1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =26a(5) =86a(6) =309a(7) =1112a(8) =4300a(9) =16355a(10) =64610a(11) =258460a(12) =1049577a(13) =4289188a(14) =17767640a(15) =74236553a(16) =312798334a(17) =1323001687a(18) =5645624363a(19) =24239460347a(20) =104391408045a(21) =451959306066
External references
- oeis: A148812