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, 0, -1), (0, 1, 0), (1, -1, 0)}.
A148186
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, 0, -1), (0, 1, 0), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =30a(6) =89a(7) =264a(8) =884a(9) =2747a(10) =9329a(11) =31445a(12) =112592a(13) =386695a(14) =1404984a(15) =5055108a(16) =18900644a(17) =68752713a(18) =260143007a(19) =974793598a(20) =3755514208a(21) =14179006578a(22) =55137620398a(23) =212489097664a(24) =836744112593
External references
- oeis: A148186