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, 0, 0), (0, 0, 1), (1, 1, -1)}.
A148281
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, 0, 0), (0, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =12a(5) =32a(6) =92a(7) =261a(8) =772a(9) =2372a(10) =7238a(11) =22596a(12) =72206a(13) =229686a(14) =741392a(15) =2431669a(16) =7948084a(17) =26247900a(18) =87708782a(19) =292258192a(20) =981394918a(21) =3325723982a(22) =11242917210a(23) =38238313052a(24) =131010982918a(25) =447908510662
External references
- oeis: A148281