The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A054555 Prime number spiral (clockwise, East spoke). 9
 2, 7, 47, 139, 283, 503, 797, 1151, 1579, 2089, 2689, 3361, 4099, 4967, 5861, 6883, 8011, 9199, 10457, 11903, 13313, 14887, 16547, 18269, 20161, 22091, 24083, 26297, 28573, 30941, 33347, 35899, 38593, 41299, 44111, 47149, 50131, 53327, 56597 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS 8-spoke wheel overlays prime number spiral; hub is 2 in shell 0; 8 spokes radiate from this hub; this is East, clockwise. LINKS Ivan Panchenko, Table of n, a(n) for n = 0..1000 FORMULA a(n) = A000040(A054556(n+1)). - R. J. Mathar, Aug 29 2018 EXAMPLE Begin a prime number spiral at shell 0 (prime 2), proceed clockwise, East. From Omar E. Pol, Feb 19 2022: (Start) The spiral with four terms in every spoke looks like this: . 227 101--103--107--109--113--127 | | | 223 97 29---31---37---41 131 | | | | | 211 89 23 3----5 43 137 | | | | | | | 199 83 19 2 7 47 139 | | | | | | 197 79 17---13---11 53 149 | | | | 193 73---71---67---61---59 151 | | 191--181--179--173--167--163--157 . (End) MATHEMATICA Table[ Prime[4n^2 - 9n + 6], {n, 1, 40} ] CROSSREFS Cf. A054556, A054551, A054553, A054564, A054566, A054568, A054570, A053999. Sequence in context: A062632 A116892 A201481 * A072287 A290488 A276649 Adjacent sequences: A054552 A054553 A054554 * A054556 A054557 A054558 KEYWORD easy,nonn AUTHOR Enoch Haga, and G. L. Honaker, Jr., Apr 10 2000 EXTENSIONS Edited by Robert G. Wilson v, Feb 25 2002 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.

Last modified February 21 02:30 EST 2024. Contains 370219 sequences. (Running on oeis4.)