A317187 Arrange primes along the square spiral; sequence lists primes on the X-axis.

2, 3, 13, 31, 67, 107, 173, 241, 347, 443, 577, 709, 877, 1049, 1249, 1471, 1697, 1973, 2243, 2539, 2833, 3191, 3541, 3911, 4289, 4729, 5179, 5651, 6131, 6637, 7159, 7699, 8293, 8867, 9473, 10133, 10799, 11503, 12251, 12941, 13709, 14537, 15289

Offset: 1

Author

N. J. A. Sloane, Jul 27 2018

Keywords

• nonn

Comments

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

References

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

Crossrefs

Cf. A317186.

Formula

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