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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A030007 a(n) = (prime(n)-3)*(prime(n)-5)/8. 1
0, 0, 1, 6, 10, 21, 28, 45, 78, 91, 136, 171, 190, 231, 300, 378, 406, 496, 561, 595, 703, 780, 903, 1081, 1176, 1225, 1326, 1378, 1485, 1891, 2016, 2211, 2278, 2628, 2701, 2926, 3160, 3321, 3570, 3828, 3916, 4371, 4465, 4656, 4753, 5356, 5995, 6216, 6328 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,4

COMMENTS

All terms are triangular numbers. - Gary Detlefs, Apr 14 2012

LINKS

T. D. Noe, Table of n, a(n) for n = 2..1000

MATHEMATICA

Table[(p - 3) (p - 5)/8, {p, Prime[Range[2, 50]]}] (* T. D. Noe, Apr 16 2012 *)

CROSSREFS

Cf. A000217.

Sequence in context: A175648 A178661 A190273 * A323729 A058549 A271511

Adjacent sequences:  A030004 A030005 A030006 * A030008 A030009 A030010

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

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 October 21 06:25 EDT 2019. Contains 328292 sequences. (Running on oeis4.)