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, 1), (0, -1, 1), (0, 1, -1), (0, 1, 1), (1, 0, 0)}.
A150574
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, 1), (0, -1, 1), (0, 1, -1), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =108a(5) =460a(6) =2040a(7) =9160a(8) =41992a(9) =193966a(10) =907142a(11) =4263879a(12) =20204144a(13) =96076478a(14) =459418961a(15) =2202642718a(16) =10602765149a(17) =51141494983a(18) =247415643188
External references
- oeis: A150574