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), (0, 1, -1), (1, -1, -1), (1, 1, 1)}.
A149584
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), (0, 1, -1), (1, -1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =53a(5) =213a(6) =857a(7) =3399a(8) =14237a(9) =61009a(10) =257511a(11) =1105689a(12) =4855837a(13) =21251923a(14) =93166051a(15) =414051993a(16) =1850820107a(17) =8249756439a(18) =37015249193a(19) =167288738749a(20) =755931867347
External references
- oeis: A149584