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, 0), (-1, 1, -1), (1, 0, 0), (1, 1, 1)}.
A150350
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, 0), (-1, 1, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =23a(4) =91a(5) =338a(6) =1431a(7) =5648a(8) =24811a(9) =101648a(10) =455335a(11) =1912221a(12) =8669523a(13) =37049004a(14) =169499233a(15) =733925969a(16) =3382008835a(17) =14796764162a(18) =68569120311a(19) =302530897701
External references
- oeis: A150350