|
| |
|
|
A121958
|
|
Quadratic n^2-n-1 functional matrix Markov of the A001053 type.
|
|
0
| |
|
|
0, 1, 1, 6, 67, 1279, 37158, 1524757, 83898793, 5958339060, 530376075133, 57816950528557, 7574550895316100, 1174113205724524057, 212522064787034170417, 44418285653695866141210
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,4
|
|
|
COMMENTS
| Recursion equalivalent is: a[n]=(n^2-n-1)*a[n-1]+a[n-2] Gets large very fast.
|
|
|
FORMULA
| M[n_] := {{0, 1}, {1, n^2 - n - 1} } v[1] = {0, 1} v[n_] := v[n] = M[n].v[n - 1] a(n) = v[n][[1]]
|
|
|
MATHEMATICA
| M[n_] := {{0, 1}, {1, n^2 - n - 1} } v[1] = {0, 1} v[n_] := v[n] = M[n].v[n - 1] a = Table[v[n][[1]], {n, 1, 30}]
|
|
|
CROSSREFS
| Cf. A001053.
Sequence in context: A073326 A024203 A073562 * A177555 A054746 A116005
Adjacent sequences: A121955 A121956 A121957 * A121959 A121960 A121961
|
|
|
KEYWORD
| nonn,uned
|
|
|
AUTHOR
| Roger Bagula (rlbagulatftn(AT)yahoo.com), Sep 02 2006
|
| |
|
|
