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), (1, -1, 0), (1, -1, 1), (1, 0, 1)}.
A148349
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), (1, -1, 0), (1, -1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =40a(6) =134a(7) =415a(8) =1432a(9) =4780a(10) =17358a(11) =59964a(12) =225359a(13) =805190a(14) =3084375a(15) =11331471a(16) =44080172a(17) =165262446a(18) =651653671a(19) =2482120277a(20) =9895945289a(21) =38203217093a(22) =153666804970a(23) =600090569568
External references
- oeis: A148349