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, -1, 1), (-1, 1, 0), (-1, 1, 1), (1, 0, 0)}.
A148549
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, -1, 1), (-1, 1, 0), (-1, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =21a(5) =44a(6) =179a(7) =405a(8) =1863a(9) =4574a(10) =20253a(11) =51083a(12) =242478a(13) =638910a(14) =2935563a(15) =7830889a(16) =37719955a(17) =103473882a(18) =485025311a(19) =1338989811a(20) =6504657404a(21) =18317722002a(22) =86944436845a(23) =245672670625
External references
- oeis: A148549