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), (0, 1, 0), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.
A151153
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), (0, 1, 0), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =47a(4) =207a(5) =937a(6) =4315a(7) =20131a(8) =94791a(9) =449385a(10) =2143131a(11) =10265971a(12) =49358949a(13) =238067903a(14) =1151299263a(15) =5580356587a(16) =27101383325a(17) =131848957507a(18) =642427203243
External references
- oeis: A151153