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A054570 Prime number spiral (clockwise, West spoke).

%I A054570 #21 Feb 19 2022 12:49:53
%S A054570 2,19,83,199,389,641,967,1361,1823,2377,3001,3709,4517,5419,6353,7477,
%T A054570 8623,9791,11159,12577,14083,15667,17417,19273,21149,23063,25229,
%U A054570 27431,29683,32183,34543,37171,39877,42641,45599,48673,51719,54973,58171
%N A054570 Prime number spiral (clockwise, West spoke).
%H A054570 Ivan Panchenko, <a href="/A054570/b054570.txt">Table of n, a(n) for n = 0..1000</a>
%F A054570 8-spoke wheel overlays prime number spiral; hub is 2 in shell 0; 8 spokes radiate from this hub; this is West, clockwise.
%F A054570 a(n) = A000040(A033951(n)). - _R. J. Mathar_, Aug 29 2018
%e A054570 Begin a prime number spiral at shell 0 (prime 2), proceed clockwise, West.
%e A054570 From _Omar E. Pol_, Feb 19 2022: (Start)
%e A054570 The spiral with four terms in every spoke looks like this:
%e A054570 .
%e A054570   227  101--103--107--109--113--127
%e A054570    |     |                       |
%e A054570   223   97   29---31---37---41  131
%e A054570    |     |    |              |   |
%e A054570   211   89   23    3----5   43  137
%e A054570    |     |    |    |    |    |   |
%e A054570   199   83   19    2    7   47  139
%e A054570    |     |    |         |    |   |
%e A054570   197   79   17---13---11   53  149
%e A054570    |     |                   |   |
%e A054570   193   73---71---67---61---59  151
%e A054570    |                             |
%e A054570   191--181--179--173--167--163--157
%e A054570 .
%e A054570 (End)
%t A054570 Table[ Prime[4n^2 + 3n + 1], {n, 0, 40} ]
%Y A054570 Cf. A033951, A054551, A054553, A054555, A054564, A054566, A054570, A053999.
%K A054570 easy,nonn
%O A054570 0,1
%A A054570 _Enoch Haga_ and _G. L. Honaker, Jr._, Apr 10 2000
%E A054570 Edited by _Frank Ellermann_, Feb 24 2002