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, 0, -1), (1, 0, 1)}.
A148636
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, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =22a(5) =61a(6) =221a(7) =715a(8) =2677a(9) =9456a(10) =36176a(11) =134565a(12) =526917a(13) =2028208a(14) =8091308a(15) =31929777a(16) =129378035a(17) =520401679a(18) =2135953773a(19) =8722585918a(20) =36193244102a(21) =149624642757a(22) =626656142107
External references
- oeis: A148636