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), (1, 1, 0)}.
A148675
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), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =21a(5) =65a(6) =205a(7) =713a(8) =2399a(9) =8807a(10) =31423a(11) =118403a(12) =442903a(13) =1696475a(14) =6569623a(15) =25553523a(16) =101307245a(17) =400537565a(18) =1612283869a(19) =6479393097a(20) =26354237909a(21) =107481783441a(22) =440881860189
External references
- oeis: A148675