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, 0), (1, 0, -1), (1, 1, -1), (1, 1, 1)}.
A149727
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, 0), (1, 0, -1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =75a(5) =289a(6) =1319a(7) =5599a(8) =26119a(9) =115565a(10) =546181a(11) =2479009a(12) =11826313a(13) =54632367a(14) =262421783a(15) =1227762805a(16) =5927841717a(17) =27999421111a(18) =135725203143a(19) =645839470791
External references
- oeis: A149727