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!)
A308516 Odd numbers which are not squares and cannot be written as a sum of a prime and a square. 0
85, 91, 771, 1255, 1351, 21679 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The sequence is probably finite. a(7) > 2000000 (if it exists).

a(7) > 1.5*10^11, if it exists. - Giovanni Resta, Jul 16 2019

LINKS

Table of n, a(n) for n=1..6.

CROSSREFS

A subsequence of A020495.

Cf. A014090, A065377.

Sequence in context: A020312 A156650 A044978 * A095593 A039487 A157469

Adjacent sequences:  A308513 A308514 A308515 * A308517 A308518 A308519

KEYWORD

nonn,more

AUTHOR

Daniel Starodubtsev, Jun 03 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 6 11:27 EDT 2022. Contains 355110 sequences. (Running on oeis4.)