login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..16.

MATHEMATICA

RecurrenceTable[{a[1]==a[2]==a[3]==1, a[n]==a[n-3] (a[n-2]+a[n-1])}, a, {n, 20}] (* Harvey P. Dale, Jan 14 2012 *)

CROSSREFS

Cf. A048122.

Sequence in context: A274336 A192648 A219339 * A001042 A214697 A035089

Adjacent sequences:  A048109 A048110 A048111 * A048113 A048114 A048115

KEYWORD

nonn,easy

AUTHOR

David Johnson-Davies

EXTENSIONS

More terms from Patrick De Geest, Jun 15 1999.

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 22 18:05 EST 2019. Contains 320400 sequences. (Running on oeis4.)