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), (0, 0, 1), (1, 0, -1), (1, 0, 1)}.
A150422
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), (0, 0, 1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =95a(5) =381a(6) =1625a(7) =6967a(8) =30701a(9) =136317a(10) =615734a(11) =2798025a(12) =12841240a(13) =59214378a(14) =274997325a(15) =1282425641a(16) =6010338554a(17) =28260119591a(18) =133377022363a(19) =631253981051
External references
- oeis: A150422