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, -1), (1, -1, 1), (1, 1, 0)}.
A148664
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, -1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =26a(5) =67a(6) =289a(7) =863a(8) =3879a(9) =12479a(10) =57361a(11) =195350a(12) =907982a(13) =3218878a(14) =15117858a(15) =55232331a(16) =261387469a(17) =978267478a(18) =4656116006a(19) =17768108651a(20) =84972070477a(21) =329509571342
External references
- oeis: A148664