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, 1), (-1, 0, 1), (0, 1, -1), (1, 0, 0)}.
A148080
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, 1), (-1, 0, 1), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =9a(5) =24a(6) =63a(7) =199a(8) =588a(9) =1854a(10) =6186a(11) =19807a(12) =67858a(13) =232652a(14) =807683a(15) =2855387a(16) =10155678a(17) =36943753a(18) =133283070a(19) =490587798a(20) =1824978741a(21) =6745329088a(22) =25387210981a(23) =95888617570a(24) =362818250454
External references
- oeis: A148080