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Arrange primes along the square spiral; sequence lists primes on the X-axis.
1

%I #8 Jul 28 2018 00:53:15

%S 2,3,13,31,67,107,173,241,347,443,577,709,877,1049,1249,1471,1697,

%T 1973,2243,2539,2833,3191,3541,3911,4289,4729,5179,5651,6131,6637,

%U 7159,7699,8293,8867,9473,10133,10799,11503,12251,12941,13709,14537,15289

%N Arrange primes along the square spiral; sequence lists primes on the X-axis.

%C This is based on the square spiral with entries starting at 1 (see A317186, Examples).

%D David James Sycamore, Posting to Sequence Fans Mailing List, Jul 24 2018

%F a(n) = prime(A317186(n)).

%Y Cf. A317186.

%K nonn

%O 1,1

%A _N. J. A. Sloane_, Jul 27 2018