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), (1, 1, 1)}.
A149079
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), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =7a(4) =28a(5) =70a(6) =256a(7) =763a(8) =2764a(9) =8566a(10) =31632a(11) =101426a(12) =374720a(13) =1246344a(14) =4604448a(15) =15560731a(16) =57829276a(17) =198086254a(18) =737203600a(19) =2563946970a(20) =9548132880a(21) =33486404056a(22) =125061142552a(23) =441810374578
External references
- oeis: A149079