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, 0, -1), (0, -1, -1), (0, 0, 1), (1, 1, 1)}.
A150355
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, 0, -1), (0, -1, -1), (0, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =23a(4) =91a(5) =350a(6) =1437a(7) =5838a(8) =24607a(9) =103920a(10) =446477a(11) =1922851a(12) =8368785a(13) =36609466a(14) =161205477a(15) =712423109a(16) =3162363453a(17) =14091280408a(18) =63018998437a(19) =282639322289
External references
- oeis: A150355