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, 0, 0), (0, 0, 1), (0, 1, -1), (1, -1, -1)}.
A148019
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, 0, 0), (0, 0, 1), (0, 1, -1), (1, -1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =17a(6) =46a(7) =120a(8) =355a(9) =1032a(10) =3100a(11) =9340a(12) =29696a(13) =95081a(14) =313347a(15) =1029034a(16) =3432205a(17) =11592025a(18) =39779168a(19) =137877429a(20) =481249138a(21) =1686693258a(22) =5964861195a(23) =21272314918a(24) =76492455917a(25) =276544510969
External references
- oeis: A148019