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, 1, -1), (0, 0, -1), (1, 0, 1), (1, 1, -1)}.
A149102
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, 1, -1), (0, 0, -1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =8a(4) =33a(5) =96a(6) =365a(7) =1256a(8) =4692a(9) =17453a(10) =66767a(11) =256482a(12) =1001942a(13) =3926568a(14) =15583714a(15) =62184933a(16) =249869139a(17) =1009404100a(18) =4096851309a(19) =16704180961a(20) =68417152583a(21) =281223053247
External references
- oeis: A149102