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, 0, 0), (-1, 0, 1), (0, 1, -1), (1, 0, 1)}.
A149244
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, 0, 0), (-1, 0, 1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =36a(5) =133a(6) =463a(7) =1747a(8) =6672a(9) =25617a(10) =101421a(11) =400597a(12) =1608184a(13) =6503107a(14) =26450908a(15) =108408013a(16) =446208268a(17) =1846168085a(18) =7673812215a(19) =31998747051a(20) =133944247824a(21) =562360415831
External references
- oeis: A149244