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, -1), (1, -1, 0), (1, -1, 1), (1, 0, 1)}.
A148348
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, -1), (1, -1, 0), (1, -1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =40a(6) =134a(7) =415a(8) =1432a(9) =4780a(10) =17264a(11) =59682a(12) =222798a(13) =796307a(14) =3025348a(15) =11120761a(16) =42897182a(17) =160722169a(18) =628867869a(19) =2392267677a(20) =9461745050a(21) =36488189918a(22) =145551730058a(23) =567697425815
External references
- oeis: A148348