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, 0), (0, 1, -1), (1, 0, 1), (1, 1, -1)}.
A149452
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, 0), (0, 1, -1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =49a(5) =190a(6) =797a(7) =3360a(8) =14534a(9) =63886a(10) =284896a(11) =1282848a(12) =5829638a(13) =26690801a(14) =122989106a(15) =569876645a(16) =2653240162a(17) =12405690763a(18) =58222972007a(19) =274173721826
External references
- oeis: A149452