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, 1), (1, 0, -1), (1, 1, 1)}.
A149568
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, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =13a(4) =61a(5) =201a(6) =961a(7) =3485a(8) =16953a(9) =65057a(10) =318501a(11) =1270385a(12) =6239385a(13) =25567503a(14) =125918427a(15) =526336207a(16) =2597780455a(17) =11027051415a(18) =54512432667a(19) =234248644823
External references
- oeis: A149568