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), (-1, 1, 1), (0, 1, -1), (1, 0, 1)}.
A148873
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), (-1, 1, 1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =29a(5) =97a(6) =354a(7) =1300a(8) =5129a(9) =19092a(10) =77071a(11) =302902a(12) =1224459a(13) =4889175a(14) =20230479a(15) =81922468a(16) =339766702a(17) =1398618423a(18) =5853729563a(19) =24226447913a(20) =102042112312a(21) =426606797100
External references
- oeis: A148873