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, 0), (-1, 1, 1), (1, 0, -1), (1, 0, 1)}.
A149295
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, 0), (-1, 1, 1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =46a(5) =149a(6) =663a(7) =2381a(8) =10910a(9) =41487a(10) =193621a(11) =764147a(12) =3610096a(13) =14634171a(14) =69738270a(15) =288397749a(16) =1383207836a(17) =5809925465a(18) =28003318571a(19) =119097228729a(20) =576285049578
External references
- oeis: A149295