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, 0, 1), (-1, 1, 0), (0, -1, 1), (0, 1, 0), (1, 0, -1)}.
A148164
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, 0, 1), (-1, 1, 0), (0, -1, 1), (0, 1, 0), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =31a(6) =98a(7) =314a(8) =1079a(9) =3773a(10) =13757a(11) =50953a(12) =193733a(13) =747508a(14) =2936032a(15) =11676165a(16) =47046523a(17) =191533397a(18) =787652467a(19) =3267141729a(20) =13661333890a(21) =57536418899a(22) =243931400240
External references
- oeis: A148164