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), (0, 1, -1), (1, 0, -1), (1, 1, 0)}.
A148282
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), (0, 1, -1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =12a(5) =32a(6) =92a(7) =271a(8) =802a(9) =2516a(10) =7892a(11) =25116a(12) =81890a(13) =267202a(14) =886770a(15) =2964251a(16) =9969622a(17) =33847964a(18) =115461276a(19) =396374112a(20) =1367694250a(21) =4740566250a(22) =16504036142a(23) =57686764804a(24) =202361337602a(25) =712238874402
External references
- oeis: A148282