login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A115745 Pentagonal numbers (A000326) that are the product of 2 palindromes greater than 1. 2
12, 22, 35, 176, 330, 2380, 2625, 2882, 3432, 3876, 4845, 8855, 9801, 12650, 14652, 15251, 21901, 26070, 52360, 61105, 66045, 84847, 111657, 137562, 156332, 197472, 230300, 254410, 260625, 270725, 287547, 295482, 351142, 359905 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..34.

EXAMPLE

66045 is the 210th pentagonal number and 66045=111*595.

CROSSREFS

Cf. A000326, A115683, A115743, A115744.

Sequence in context: A098955 A285470 A124885 * A129639 A153361 A200197

Adjacent sequences:  A115742 A115743 A115744 * A115746 A115747 A115748

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Jan 31 2006

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 11 06:08 EDT 2022. Contains 356046 sequences. (Running on oeis4.)