|
Search: id:A122055
|
|
|
| A122055 |
|
A Somos 9 type recursion:a(n) = (3*a(n - 1)a(n - 8) - a(n - 4)*a(n - 5))/a(n - 9). |
|
+0
1
|
|
| 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 5, 14, 41, 121, 353, 989, 2393, 9397, 49121, 342793, 2842633, 24619238, 211654405, 1731275594, 11581792513, 107195509553, 1126517154817, 16124559341513, 342648008481505, 8465982933121657, 213444061953471233
(list; graph; listen)
|
|
|
OFFSET
|
1,10
|
|
|
FORMULA
|
a(n) = (3*a(n - 1)a(n - 8) - a(n - 4)*a(n - 5))/a(n - 9)
|
|
MATHEMATICA
|
a[n_] := a[n] = (3*a[n - 1]a[n - 8] - a[n - 4]*a[n - 5])/a[n - 9]; a[0] = 1; a[1] = 1; a[2] = 1; a[3] = 1; a[4] = 1; a[5] = 1; a[6] = 1; a[7] = 1; a[8] = 1; Table[a[n], {n, 0, 30}]
|
|
CROSSREFS
|
Cf. A006731.
Sequence in context: A116850 A116847 A116848 this_sequence A116845 A116849 A007051
Adjacent sequences: A122052 A122053 A122054 this_sequence A122056 A122057 A122058
|
|
KEYWORD
|
nonn,uned
|
|
AUTHOR
|
Roger Bagula (rlbagulatftn(AT)yahoo.com), Sep 13 2006
|
|
|
Search completed in 0.002 seconds
|
