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), (0, 1, -1), (1, -1, 1), (1, 0, 1), (1, 1, 1)}.
A151005
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), (0, 1, -1), (1, -1, 1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =38a(4) =177a(5) =823a(6) =3953a(7) =19003a(8) =92593a(9) =451880a(10) =2220395a(11) =10923924a(12) =53945354a(13) =266670612a(14) =1321190761a(15) =6550924502a(16) =32527305279a(17) =161609300887a(18) =803687085750
External references
- oeis: A151005