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, 1), (-1, 1, 1), (0, 1, -1), (1, -1, 1), (1, 0, 0)}.
A148876
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, 1), (-1, 1, 1), (0, 1, -1), (1, -1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =29a(5) =107a(6) =431a(7) =1784a(8) =7638a(9) =33420a(10) =148739a(11) =671858a(12) =3068426a(13) =14150462a(14) =65767886a(15) =307751287a(16) =1448287916a(17) =6849461114a(18) =32532585554a(19) =155097851229a(20) =741865738329
External references
- oeis: A148876