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, 0, -1), (0, 1, -1), (1, 0, 0)}.
A148337
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, 0, -1), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =47a(6) =143a(7) =473a(8) =1629a(9) =5605a(10) =20435a(11) =73465a(12) =269905a(13) =1008533a(14) =3767243a(15) =14375250a(16) =54928164a(17) =211709811a(18) =822476562a(19) =3204543546a(20) =12593678660a(21) =49651915597a(22) =196804253006a(23) =783229067840
External references
- oeis: A148337