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), (0, 1, -1), (1, 0, 1)}.
A148288
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), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =13a(5) =33a(6) =101a(7) =302a(8) =874a(9) =2830a(10) =9106a(11) =28087a(12) =93942a(13) =313951a(14) =1009303a(15) =3444843a(16) =11779708a(17) =38944643a(18) =134917573a(19) =468365563a(20) =1579283326a(21) =5534789319a(22) =19424123847a(23) =66442780503a(24) =234990336296a(25) =831643128190
External references
- oeis: A148288