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, 0, 0), (0, -1, 1), (0, 0, 1), (0, 1, 1), (1, 1, -1)}.
A150575
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, 0, 0), (0, -1, 1), (0, 0, 1), (0, 1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =108a(5) =461a(6) =2034a(7) =9151a(8) =41846a(9) =193537a(10) =903807a(11) =4252089a(12) =20128339a(13) =95773027a(14) =457664391a(15) =2195009182a(16) =10560857316a(17) =50950249692a(18) =246393307834
External references
- oeis: A150575