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, 0), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.
A149053
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, 0), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =40a(5) =154a(6) =677a(7) =2815a(8) =12795a(9) =55992a(10) =260063a(11) =1171488a(12) =5519680a(13) =25390443a(14) =120790770a(15) =563597058a(16) =2701493583a(17) =12740989900a(18) =61404619312a(19) =291993134549
External references
- oeis: A149053