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), (0, -1, 1), (1, 0, -1), (1, 1, 1)}.
A149592
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), (0, -1, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =57a(5) =217a(6) =903a(7) =3645a(8) =15229a(9) =65109a(10) =279725a(11) =1204423a(12) =5273461a(13) =23266449a(14) =102770929a(15) =456619979a(16) =2044838287a(17) =9174556253a(18) =41260461173a(19) =186519911601a(20) =846046745543
External references
- oeis: A149592