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, 1), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
A150974
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, 1), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =36a(4) =162a(5) =725a(6) =3381a(7) =15727a(8) =74389a(9) =352586a(10) =1685865a(11) =8076043a(12) =38880209a(13) =187543256a(14) =907589501a(15) =4399165975a(16) =21370840170a(17) =103962145574a(18) =506584189467
External references
- oeis: A150974