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, 0, 1), (-1, 1, 1), (0, 1, -1), (1, 0, 0)}.
A148691
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, 0, 1), (-1, 1, 1), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =23a(5) =66a(6) =225a(7) =776a(8) =2686a(9) =9613a(10) =35294a(11) =131500a(12) =487822a(13) =1863370a(14) =7150828a(15) =27545304a(16) =106963502a(17) =420425777a(18) =1654948705a(19) =6538318841a(20) =26054053228a(21) =104186093986a(22) =417521937748
External references
- oeis: A148691