|
| |
|
|
A048112
|
|
a(1) = 1, a(2) = 1, a(3) = 1, a(n) = a(n-3) * (a(n-2) + a(n-1)).
|
|
2
| |
|
|
1, 1, 1, 2, 3, 5, 16, 63, 395, 7328, 486549, 195081415, 1433122040192, 697379012200764243, 136045964066902820948075525, 194970470582876525091946983913863955456
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,4
|
|
|
MATHEMATICA
| RecurrenceTable[{a[1]==a[2]==a[3]==1, a[n]==a[n-3] (a[n-2]+a[n-1])}, a, {n, 20}] (* From Harvey P. Dale, Jan 14 2012 *)
|
|
|
CROSSREFS
| Cf. A048122.
Sequence in context: A120755 A111183 A192648 * A001042 A035089 A045313
Adjacent sequences: A048109 A048110 A048111 * A048113 A048114 A048115
|
|
|
KEYWORD
| nonn,easy
|
|
|
AUTHOR
| David Johnson-Davies (david(AT)interface.co.uk)
|
|
|
EXTENSIONS
| More terms from Patrick De Geest (pdg(AT)worldofnumbers.com), Jun 15 1999.
|
| |
|
|
