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!)
A201711 Primes of the form 10n^2 + 9. 1
19, 499, 1009, 1699, 8419, 9619, 14449, 21169, 24019, 28099, 30259, 34819, 38449, 49009, 53299, 68899, 84649, 94099, 102019, 118819, 141619, 156259, 169009, 176899, 184969, 187699, 240259, 259219, 268969, 306259, 309769, 327619 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..5000

MATHEMATICA

Select[Table[10n^2+9, {n, 0, 1000}], PrimeQ]

PROG

(MAGMA) [a: n in [0..300] | IsPrime(a) where a is 10*n^2+9];

CROSSREFS

Sequence in context: A093975 A159248 A284220 * A243784 A158583 A009081

Adjacent sequences:  A201708 A201709 A201710 * A201712 A201713 A201714

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Dec 04 2011

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 April 9 18:59 EDT 2020. Contains 333362 sequences. (Running on oeis4.)