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), (0, 0, 1), (0, 1, 1), (1, 1, -1), (1, 1, 1)}.
A151225
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), (0, 0, 1), (0, 1, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =13a(3) =57a(4) =269a(5) =1267a(6) =6129a(7) =29645a(8) =145095a(9) =710535a(10) =3500401a(11) =17256579a(12) =85355383a(13) =422475977a(14) =2095217557a(15) =10397145389a(16) =51658229869a(17) =256791607647
External references
- oeis: A151225