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

 

Logo

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A066631 The sequence f(1), f(2), ... as defined in A068192. 2
4, 8, 24, 120, 840, 9240, 120120, 2042040, 38798760, 1202761560, 34880085240, 802241960520, 32891920381320, 1414352576396760, 52331045326680120, 4657463034074530680, 274790319010397310120, 14563886907551057436360 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..18.

PROG

(PARI) {a=4; for(n=1, 18, print1(a, ", "); b=a-precprime(a-2); a=a*b)}

CROSSREFS

Cf. A068192.

Sequence in context: A008950 A045881 A052578 * A090896 A131637 A163143

Adjacent sequences:  A066628 A066629 A066630 * A066632 A066633 A066634

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jun 10 2002

EXTENSIONS

Edited by Dean Hickerson and Klaus Brockhaus, Jun 10 2002

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified December 10 07:51 EST 2016. Contains 278994 sequences.