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, 0, 0), (-1, 0, 1), (0, -1, 0), (0, 0, -1), (1, 1, 1)}.
A149758
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, 0, 0), (-1, 0, 1), (0, -1, 0), (0, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =69a(5) =277a(6) =1185a(7) =5009a(8) =21325a(9) =92733a(10) =408629a(11) =1807995a(12) =8038887a(13) =35981881a(14) =162014757a(15) =732494001a(16) =3321753179a(17) =15111904573a(18) =68984336243a(19) =315806352009
External references
- oeis: A149758