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)}.
A149144
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) =4a(3) =9a(4) =36a(5) =116a(6) =446a(7) =1607a(8) =6220a(9) =23956a(10) =94706a(11) =376166a(12) =1508378a(13) =6097770a(14) =24848216a(15) =101794745a(16) =419633188a(17) =1735005118a(18) =7212840484a(19) =30073470046a(20) =125884517868a(21) =528435742844
External references
- oeis: A149144