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, -1), (-1, 0, 1), (0, -1, 1), (0, 1, 1), (1, 1, 0)}.
A150503
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, -1), (-1, 0, 1), (0, -1, 1), (0, 1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =102a(5) =408a(6) =1723a(7) =7320a(8) =31703a(9) =138362a(10) =611103a(11) =2714012a(12) =12133531a(13) =54528943a(14) =246177191a(15) =1115631262a(16) =5074220799a(17) =23149462838a(18) =105898900015a(19) =485654339647
External references
- oeis: A150503