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, 0, 1), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.
A148429
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, 0, 1), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =18a(5) =64a(6) =256a(7) =1034a(8) =4356a(9) =18614a(10) =81247a(11) =359337a(12) =1610581a(13) =7291244a(14) =33307717a(15) =153290739a(16) =710110090a(17) =3307993147a(18) =15485937086a(19) =72808065800a(20) =343619902508
External references
- oeis: A148429