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, 0), (-1, 0, 0), (-1, 1, 0), (0, 1, -1), (1, 0, 1)}.
A149322
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, 0), (-1, 0, 0), (-1, 1, 0), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =37a(5) =146a(6) =532a(7) =1939a(8) =7867a(9) =30759a(10) =119428a(11) =494439a(12) =1998117a(13) =8031890a(14) =33663606a(15) =138767875a(16) =569739552a(17) =2408265131a(18) =10058849444a(19) =41885466587a(20) =178161102199a(21) =751113795845
External references
- oeis: A149322