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, 1, 0), (0, 0, -1), (1, 0, -1), (1, 0, 0)}.
A148039
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, 1, 0), (0, 0, -1), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =19a(6) =55a(7) =145a(8) =438a(9) =1319a(10) =4258a(11) =13442a(12) =44510a(13) =148574a(14) =512622a(15) =1765355a(16) =6199765a(17) =21989638a(18) =79344998a(19) =287621419a(20) =1052530049a(21) =3883860734a(22) =14482939260a(23) =54310810535a(24) =204858164609a(25) =777520351881
External references
- oeis: A148039