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%I #21 Feb 19 2022 13:06:02
%S 2,7,47,139,283,503,797,1151,1579,2089,2689,3361,4099,4967,5861,6883,
%T 8011,9199,10457,11903,13313,14887,16547,18269,20161,22091,24083,
%U 26297,28573,30941,33347,35899,38593,41299,44111,47149,50131,53327,56597
%N Prime number spiral (clockwise, East spoke).
%C 8-spoke wheel overlays prime number spiral; hub is 2 in shell 0; 8 spokes radiate from this hub; this is East, clockwise.
%H Ivan Panchenko, <a href="/A054555/b054555.txt">Table of n, a(n) for n = 0..1000</a>
%F a(n) = A000040(A054556(n+1)). - _R. J. Mathar_, Aug 29 2018
%e Begin a prime number spiral at shell 0 (prime 2), proceed clockwise, East.
%e From _Omar E. Pol_, Feb 19 2022: (Start)
%e The spiral with four terms in every spoke looks like this:
%e .
%e 227 101--103--107--109--113--127
%e | | |
%e 223 97 29---31---37---41 131
%e | | | | |
%e 211 89 23 3----5 43 137
%e | | | | | | |
%e 199 83 19 2 7 47 139
%e | | | | | |
%e 197 79 17---13---11 53 149
%e | | | |
%e 193 73---71---67---61---59 151
%e | |
%e 191--181--179--173--167--163--157
%e .
%e (End)
%t Table[ Prime[4n^2 - 9n + 6], {n, 1, 40} ]
%Y Cf. A054556, A054551, A054553, A054564, A054566, A054568, A054570, A053999.
%K easy,nonn
%O 0,1
%A _Enoch Haga_, and _G. L. Honaker, Jr._, Apr 10 2000
%E Edited by _Robert G. Wilson v_, Feb 25 2002
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