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), (-1, 1, 0), (0, 0, -1), (1, 0, 1), (1, 1, 0)}.
A150742
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), (-1, 1, 0), (0, 0, -1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =29a(4) =124a(5) =529a(6) =2359a(7) =10644a(8) =48948a(9) =226835a(10) =1062866a(11) =5009699a(12) =23764365a(13) =113259223a(14) =542090212a(15) =2603533029a(16) =12543230270a(17) =60588404420a(18) =293350409953
External references
- oeis: A150742