login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A068507 Highly composite numbers sandwiched between twin primes. 5
4, 6, 12, 60, 180, 240, 7560, 55440, 110880, 73329656400, 18632716502400, 130429015516800, 48519593772249600, 149602080797769600, 74377068101903920953600, 927967188666725711881005276648000, 241271469053348685089061371928480000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Intersection of (A072826 - 1) and (A072828 + 1). - Lekraj Beedassy, Nov 27 2003

The next term is A002182(1002), it has 77 digits. - M. F. Hasler, Jun 23 2019

LINKS

M. F. Hasler, Table of n, a(n) for n = 1..20

EXAMPLE

60 is between 59 and 61.

CROSSREFS

Cf. A002182, A117825.

Sequence in context: A154666 A050537 A114413 * A133454 A061072 A130435

Adjacent sequences:  A068504 A068505 A068506 * A068508 A068509 A068510

KEYWORD

nonn

AUTHOR

Lekraj Beedassy, Mar 25 2002

EXTENSIONS

Corrected and extended by Lior Manor Jun 03 2002

More terms from Bill McEachen, May 24 2006

a(18)-a(20) from M. F. Hasler, Jun 23 2019

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 26 12:33 EST 2020. Contains 332279 sequences. (Running on oeis4.)