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, 0), (-1, 0, 1), (0, -1, 0), (1, 1, 0)}.
A149532
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, 0), (-1, 0, 1), (0, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =13a(4) =49a(5) =177a(6) =645a(7) =2489a(8) =9621a(9) =37389a(10) =149641a(11) =595069a(12) =2401449a(13) =9767733a(14) =39781097a(15) =163511229a(16) =674229217a(17) =2789228345a(18) =11601713781a(19) =48355166633a(20) =202230993541a(21) =848452552753
External references
- oeis: A149532