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A054564 Prime number spiral (clockwise, Southeast spoke). 8
2, 11, 59, 157, 313, 547, 829, 1201, 1621, 2153, 2749, 3463, 4217, 5059, 6011, 7001, 8167, 9343, 10631, 12071, 13513, 15107, 16759, 18481, 20399, 22343, 24371, 26591, 28807, 31231, 33617, 36229, 38891, 41647, 44501, 47533, 50549, 53759, 56957 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

8-spoke wheel overlays prime number spiral; hub is 2 in shell 0; 8 spokes radiate from this hub; this is Southeast, clockwise.

LINKS

Ivan Panchenko, Table of n, a(n) for n = 0..1000

FORMULA

a(n) = A000040(A053755(n)). - R. J. Mathar, Aug 29 2018

EXAMPLE

Begin a prime number spiral at shell 0 (prime 2), proceed clockwise, Southeast.

MATHEMATICA

Table[ Prime[4n^2 + 1], {n, 0, 40} ]

CROSSREFS

Cf. A053755, A054551, A054553, A054555, A054566, A054568, A054570, A053999.

Sequence in context: A162771 A020057 A210646 * A280674 A139172 A228868

Adjacent sequences:  A054561 A054562 A054563 * A054565 A054566 A054567

KEYWORD

easy,nonn

AUTHOR

Enoch Haga and G. L. Honaker, Jr., Apr 10 2000

EXTENSIONS

Edited by Frank Ellermann, Feb 24 2002

STATUS

approved

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Last modified September 28 04:24 EDT 2021. Contains 347698 sequences. (Running on oeis4.)