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, 1, 1), (1, -1, 0), (1, 1, -1)}.
A149002
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, 1, 1), (1, -1, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =34a(5) =116a(6) =477a(7) =1859a(8) =7948a(9) =32632a(10) =143726a(11) =612941a(12) =2757686a(13) =12065542a(14) =55091704a(15) =245697707a(16) =1134244877a(17) =5134435274a(18) =23907000403a(19) =109493081635a(20) =513387977439
External references
- oeis: A149002