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!)
A199801 Primitive elements of A060355: n such that n and n+1 are powerful but n is not of the form 4m(m+1) where m and m+1 are powerful. 2
8, 675, 9800, 12167, 235224, 465124, 11309768, 4931691075, 5425069447, 13051463048, 8192480787000, 11968683934831, 15061377048200, 28821995554247 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
This sequence is infinite. See the comment dated Nov 19 2012 in A060355. - Franklin T. Adams-Watters, Nov 09 2013
LINKS
Donovan Johnson, Table of n, a(n) for n = 1..24 (terms < 10^22)
EXAMPLE
8 and 9 are powerful and although 8 = 4*1*(1+1), 1+1 is not powerful so 8 is in this sequence.
288 and 289 are powerful but 288 = 4*8*(8+1) and both 8 and 8+1 are powerful so 288 is not in this sequence.
675 and 676 are powerful and 675 is not of the form 4m(m+1) so 675 is in this sequence.
CROSSREFS
Subsequence of A060355 and hence of A001694.
Sequence in context: A286394 A101180 A128875 * A278857 A334088 A343191
KEYWORD
nonn
AUTHOR
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 March 19 06:47 EDT 2024. Contains 370953 sequences. (Running on oeis4.)