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), (0, 1, 1), (1, -1, -1)}.
A148065
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), (0, 1, 1), (1, -1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =12a(5) =25a(6) =77a(7) =201a(8) =736a(9) =2009a(10) =7091a(11) =21545a(12) =78274a(13) =237897a(14) =903894a(15) =2872275a(16) =10734876a(17) =35317989a(18) =135653517a(19) =448156807a(20) =1740713832a(21) =5905699865a(22) =22903738044a(23) =78582846753a(24) =310297396582
External references
- oeis: A148065