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, -1)}.
A150566
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, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =107a(5) =455a(6) =2012a(7) =9074a(8) =41594a(9) =192924a(10) =903470a(11) =4262270a(12) =20231693a(13) =96516302a(14) =462374120a(15) =2222933809a(16) =10719593222a(17) =51828194331a(18) =251155772898
External references
- oeis: A150566