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, 1), (0, 0, -1), (0, 1, -1), (1, 0, 0)}.
A148338
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, 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) =163a(7) =557a(8) =2032a(9) =7620a(10) =28483a(11) =110339a(12) =435718a(13) =1715808a(14) =6908927a(15) =28168216a(16) =114527372a(17) =473085369a(18) =1972380056a(19) =8202101812a(20) =34515070572a(21) =146288036328a(22) =618565633708
External references
- oeis: A148338