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, 1, -1), (-1, 1, 0), (1, -1, -1), (1, 1, 1)}.
A149524
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, 1, -1), (-1, 1, 0), (1, -1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =11a(4) =51a(5) =159a(6) =727a(7) =2493a(8) =11601a(9) =42313a(10) =197457a(11) =752887a(12) =3527891a(13) =13829581a(14) =65034213a(15) =260677075a(16) =1228733899a(17) =5008272491a(18) =23661262703a(19) =97742559015a(20) =462614464051
External references
- oeis: A149524