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), (0, 1, -1), (1, -1, 0)}.
A148104
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), (0, 1, -1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =26a(6) =81a(7) =249a(8) =829a(9) =2781a(10) =9734a(11) =34536a(12) =126493a(13) =467981a(14) =1772281a(15) =6773484a(16) =26300887a(17) =103087732a(18) =408575953a(19) =1633521878a(20) =6587707484a(21) =26766158187a(22) =109535161586a(23) =451095906037
External references
- oeis: A148104