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), (-1, 1, 1), (1, 0, -1), (1, 0, 1)}.
A148767
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), (-1, 1, 1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =29a(5) =93a(6) =365a(7) =1229a(8) =5293a(9) =19663a(10) =83229a(11) =311889a(12) =1387721a(13) =5469539a(14) =23973181a(15) =94601473a(16) =428312559a(17) =1746245251a(18) =7805363683a(19) =31773614049a(20) =145453492511a(21) =606234306813
External references
- oeis: A148767