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A054568 Prime number spiral (clockwise, Southwest spoke).

%I A054568 #18 Feb 19 2022 13:11:09
%S A054568 2,17,73,191,367,607,919,1297,1753,2309,2909,3623,4421,5303,6257,7307,
%T A054568 8447,9643,10979,12421,13883,15467,17203,19037,20921,22853,24953,
%U A054568 27091,29389,31859,34267,36847,39551,42307,45233,48311,51407,54547,57781
%N A054568 Prime number spiral (clockwise, Southwest spoke).
%H A054568 Ivan Panchenko, <a href="/A054568/b054568.txt">Table of n, a(n) for n = 0..1000</a>
%F A054568 8-spoke wheel overlays prime number spiral; hub is 2 in shell 0; 8 spokes radiate from this hub; this is Southwest, clockwise.
%F A054568 a(n) = A000040(A054569(n+1)). - _R. J. Mathar_, Aug 29 2018
%e A054568 Begin a prime number spiral at shell 0 (prime 2), proceed clockwise, Southwest.
%e A054568 From _Omar E. Pol_, Feb 19 2022: (Start)
%e A054568 The spiral with four terms in every spoke looks like this:
%e A054568 .
%e A054568   227  101--103--107--109--113--127
%e A054568    |     |                       |
%e A054568   223   97   29---31---37---41  131
%e A054568    |     |    |              |   |
%e A054568   211   89   23    3----5   43  137
%e A054568    |     |    |    |    |    |   |
%e A054568   199   83   19    2    7   47  139
%e A054568    |     |    |         |    |   |
%e A054568   197   79   17---13---11   53  149
%e A054568    |     |                   |   |
%e A054568   193   73---71---67---61---59  151
%e A054568    |                             |
%e A054568   191--181--179--173--167--163--157
%e A054568 .
%e A054568 (End)
%t A054568 Table[ Prime[4n^2 - 6n + 3], {n, 1, 40} ]
%Y A054568 Cf. A054569, A054551, A054553, A054555, A054564, A054566, A054570, A053999.
%K A054568 easy,nonn
%O A054568 0,1
%A A054568 _Enoch Haga_ and _G. L. Honaker, Jr._, Apr 10 2000
%E A054568 Edited by _Robert G. Wilson v_, Feb 25 2002