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, 0), (-1, 1, -1), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
A150915
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, 0), (-1, 1, -1), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =32a(4) =147a(5) =623a(6) =2849a(7) =12949a(8) =59860a(9) =279350a(10) =1311051a(11) =6191988a(12) =29398490a(13) =140007030a(14) =669717786a(15) =3210915735a(16) =15439768070a(17) =74406932724a(18) =359282830255
External references
- oeis: A150915