login
This site is supported by donations to The OEIS Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A179262 a(n) = 2*prime(n)^2 - 1. 2
7, 17, 49, 97, 241, 337, 577, 721, 1057, 1681, 1921, 2737, 3361, 3697, 4417, 5617, 6961, 7441, 8977, 10081, 10657, 12481, 13777, 15841, 18817, 20401, 21217, 22897, 23761, 25537, 32257, 34321, 37537, 38641, 44401, 45601, 49297, 53137, 55777 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Michael De Vlieger, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = A079704(n) - 1 = 2*prime(n)^2 - 1. - R. J. Mathar, Jul 08 2010

MATHEMATICA

Array[2 Prime[#]^2 - 1 &, 10^4] (* Michael De Vlieger, Oct 06 2019 *)

CROSSREFS

Cf. A000040.

Sequence in context: A104164 A192244 A110097 * A018672 A221591 A045821

Adjacent sequences:  A179259 A179260 A179261 * A179263 A179264 A179265

KEYWORD

nonn

AUTHOR

Frank Wals (frank.wals(AT)gmail.com), Jul 06 2010, Jul 09 2010

EXTENSIONS

More terms from R. J. Mathar, Jul 08 2010

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 14 07:03 EST 2019. Contains 329978 sequences. (Running on oeis4.)