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), (-1, 1, -1), (0, 1, 1), (1, -1, 0), (1, 0, -1)}.
A148937
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), (-1, 1, -1), (0, 1, 1), (1, -1, 0), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =28a(5) =102a(6) =378a(7) =1408a(8) =5508a(9) =22306a(10) =89503a(11) =365635a(12) =1539892a(13) =6456566a(14) =27184822a(15) =116960718a(16) =503981206a(17) =2171078298a(18) =9476079313a(19) =41546823539a(20) =182158914880a(21) =804098318961
External references
- oeis: A148937