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, -1), (1, -1, -1), (1, 1, 0)}.
A148608
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, -1), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =21a(5) =53a(6) =202a(7) =569a(8) =2281a(9) =6933a(10) =28501a(11) =91572a(12) =383287a(13) =1281011a(14) =5443007a(15) =18740143a(16) =80575328a(17) =284058305a(18) =1232785476a(19) =4430127226a(20) =19373902057a(21) =70731957328a(22) =311300116487
External references
- oeis: A148608