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), (-1, 1, -1), (-1, 1, 0), (1, 0, 0)}.
A148052
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), (-1, 1, -1), (-1, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =10a(5) =20a(6) =63a(7) =133a(8) =516a(9) =1218a(10) =4465a(11) =10703a(12) =44548a(13) =113711a(14) =450058a(15) =1153535a(16) =4996768a(17) =13352786a(18) =55352661a(19) =147886291a(20) =657261944a(21) =1810272037a(22) =7740475160a(23) =21274221703a(24) =96257801996a(25) =270869293600
External references
- oeis: A148052