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, 1), (-1, 1, 0), (1, -1, -1), (1, 1, 1)}.
A149555
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, 1), (-1, 1, 0), (1, -1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =13a(4) =59a(5) =191a(6) =895a(7) =3233a(8) =15291a(9) =58181a(10) =278461a(11) =1101167a(12) =5304679a(13) =21512059a(14) =104199381a(15) =431007545a(16) =2095651099a(17) =8800266609a(18) =42922087355a(19) =182464900247a(20) =892093245467
External references
- oeis: A149555