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, 0, 0), (0, -1, 0), (0, 1, 0), (0, 1, 1), (1, 1, -1)}.
A150409
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, 0, 0), (0, -1, 0), (0, 1, 0), (0, 1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =94a(5) =370a(6) =1532a(7) =6430a(8) =27613a(9) =120105a(10) =529004a(11) =2353732a(12) =10560201a(13) =47741258a(14) =217182975a(15) =993689378a(16) =4569028343a(17) =21102587065a(18) =97856367075a(19) =455411592395
External references
- oeis: A150409