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, 0, 0), (-1, 1, 1), (0, -1, 0), (0, 0, 1), (1, 0, -1)}.
A148322
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, 0, 0), (-1, 1, 1), (0, -1, 0), (0, 0, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =41a(6) =132a(7) =442a(8) =1524a(9) =5470a(10) =20059a(11) =74978a(12) =286336a(13) =1108833a(14) =4349771a(15) =17293196a(16) =69428179a(17) =281307331a(18) =1150317126a(19) =4738033915a(20) =19649014226a(21) =82036268908a(22) =344417930644
External references
- oeis: A148322