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), (0, 0, 1), (0, 1, -1), (0, 1, 0), (1, 0, 1)}.
A151107
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), (0, 0, 1), (0, 1, -1), (0, 1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =44a(4) =189a(5) =836a(6) =3775a(7) =17340a(8) =80636a(9) =378332a(10) =1788088a(11) =8501974a(12) =40620628a(13) =194858456a(14) =937964265a(15) =4528198964a(16) =21915789948a(17) =106302387911a(18) =516614920778
External references
- oeis: A151107