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, 0, 1), (0, 0, 1), (0, 1, -1), (1, -1, -1)}.
A148025
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, 0, 1), (0, 0, 1), (0, 1, -1), (1, -1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =17a(6) =48a(7) =122a(8) =395a(9) =1095a(10) =3565a(11) =10498a(12) =36423a(13) =113588a(14) =400915a(15) =1294654a(16) =4695827a(17) =15653358a(18) =57750008a(19) =197633230a(20) =741156506a(21) =2588878371a(22) =9831118022a(23) =34990852607a(24) =134443887666a(25) =485956154601
External references
- oeis: A148025