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, -1), (0, 1, 1), (1, -1, -1), (1, 0, 1)}.
A150180
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, -1), (0, 1, 1), (1, -1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =78a(5) =294a(6) =1232a(7) =5054a(8) =22030a(9) =94440a(10) =422108a(11) =1860772a(12) =8464620a(13) =38065850a(14) =175367844a(15) =800356552a(16) =3723096760a(17) =17182360742a(18) =80544863800a(19) =375031606144
External references
- oeis: A150180