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, 0, 1), (0, 1, -1), (1, 0, -1), (1, 1, 1)}.
A150923
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, 0, 1), (0, 1, -1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =33a(4) =145a(5) =624a(6) =2811a(7) =12770a(8) =59045a(9) =274746a(10) =1291347a(11) =6099917a(12) =28987799a(13) =138336728a(14) =662762769a(15) =3185314137a(16) =15353072483a(17) =74180403680a(18) =359207508273
External references
- oeis: A150923