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), (-1, 1, -1), (0, 0, -1), (1, 0, 1)}.
A148546
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), (-1, 1, -1), (0, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =19a(5) =51a(6) =173a(7) =531a(8) =1787a(9) =6255a(10) =22357a(11) =78863a(12) =285273a(13) =1035873a(14) =3894181a(15) =14628591a(16) =55113149a(17) =208744661a(18) =798606157a(19) =3087248599a(20) =12007484653a(21) =46699329757a(22) =182421963277a(23) =716322832651
External references
- oeis: A148546