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, 1, -1), (1, -1, 0), (1, 1, 0)}.
A149348
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, 1, -1), (1, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =42a(5) =153a(6) =593a(7) =2333a(8) =9522a(9) =39283a(10) =165815a(11) =706828a(12) =3058009a(13) =13331249a(14) =58754207a(15) =260519211a(16) =1164703413a(17) =5233155799a(18) =23664405546a(19) =107456289612a(20) =490466225257
External references
- oeis: A149348