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, 0), (0, 1, -1), (1, 0, -1), (1, 0, 0)}.
A148040
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, 0), (0, 1, -1), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =19a(6) =55a(7) =152a(8) =475a(9) =1462a(10) =4746a(11) =15587a(12) =53395a(13) =183704a(14) =645336a(15) =2304003a(16) =8369954a(17) =30628353a(18) =113457813a(19) =425476602a(20) =1610303851a(21) =6134996528a(22) =23581388253a(23) =91405898719a(24) =356438621366
External references
- oeis: A148040