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, 0, 1), (0, 0, 1), (0, 1, -1), (1, -1, 1)}.
A148155
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, 0, 1), (0, 0, 1), (0, 1, -1), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =30a(6) =95a(7) =301a(8) =1009a(9) =3456a(10) =12224a(11) =44125a(12) =162233a(13) =605635a(14) =2292782a(15) =8784156a(16) =34020119a(17) =132973231a(18) =524230617a(19) =2082337971a(20) =8329063745a(21) =33523745895a(22) =135704089247a(23) =552226170127
External references
- oeis: A148155