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), (0, 1, 1), (1, -1, -1), (1, 1, -1)}.
A148656
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), (0, 1, 1), (1, -1, -1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =24a(5) =64a(6) =234a(7) =773a(8) =2834a(9) =9831a(10) =37010a(11) =136510a(12) =515786a(13) =1945824a(14) =7551398a(15) =28998957a(16) =113230854a(17) =443548687a(18) =1754250827a(19) =6920531600a(20) =27637345567a(21) =110388869744a(22) =443391403250
External references
- oeis: A148656