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, 0, 0), (1, 1, 1)}.
A150497
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, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =101a(5) =408a(6) =1723a(7) =7314a(8) =31715a(9) =138570a(10) =612009a(11) =2720079a(12) =12167213a(13) =54695380a(14) =247025885a(15) =1119992583a(16) =5095775185a(17) =23254904456a(18) =106415683613a(19) =488163587257
External references
- oeis: A150497