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, 1), (0, 0, -1), (0, 1, -1), (1, 0, 1)}.
A149367
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, 1), (0, 0, -1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =45a(5) =160a(6) =678a(7) =2689a(8) =10987a(9) =46623a(10) =200648a(11) =853429a(12) =3708622a(13) =16347640a(14) =71949049a(15) =317419539a(16) =1419224447a(17) =6362428004a(18) =28500854794a(19) =128527458182a(20) =582669917201
External references
- oeis: A149367