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

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A167843 Obtuse-angled primes. 4
113, 127, 137, 139, 149, 157, 167, 179, 199, 211, 223 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Primes in A135603.

Primes whose structure of digits represent an obtuse angle. The vertex is an internal digit. In the graphic representation the points are connected by imaginary line segments from left to right.

LINKS

Table of n, a(n) for n=1..11.

CROSSREFS

Cf. A134811, A134951, A134971, A135603, A167841, A167842, A167844, A167845, A167846, A167853.

Sequence in context: A345072 A214503 A054033 * A159466 A284598 A060591

Adjacent sequences:  A167840 A167841 A167842 * A167844 A167845 A167846

KEYWORD

base,more,nonn

AUTHOR

Omar E. Pol, Nov 13 2009

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 December 6 13:05 EST 2021. Contains 349563 sequences. (Running on oeis4.)