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, 0, 1), (1, -1, -1), (1, 1, 0)}.
A148607
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, 0, 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) =382882a(13) =1279932a(14) =5424970a(15) =18676220a(16) =80058270a(17) =282026434a(18) =1220098137a(19) =4380501274a(20) =19090021522a(21) =69650371887a(22) =305346144341
External references
- oeis: A148607