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, 1, -1), (0, 1, 0), (1, -1, 0)}.
A148188
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, 1, -1), (0, 1, 0), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =30a(6) =95a(7) =271a(8) =935a(9) =2912a(10) =10474a(11) =34733a(12) =129609a(13) =450096a(14) =1724684a(15) =6209005a(16) =24312877a(17) =90073297a(18) =358940844a(19) =1361395098a(20) =5505083763a(21) =21292341540a(22) =87172110848a(23) =342795746008
External references
- oeis: A148188