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A257347 1 followed by the numbers successively added to the four arms of the spirals in A257329, A257330, A257331, A257332. 4
1, 2, 3, 5, 7, 11, 4, 6, 9, 13, 17, 19, 23, 25, 29, 8, 15, 21, 31, 35, 14, 37, 41, 43, 47, 27, 49, 16, 12, 10, 33, 53, 59, 39, 61, 67, 22, 20, 18, 45, 65, 71, 73, 79, 83, 24, 51, 55, 26, 85, 77, 89, 97, 32, 57, 91, 101, 95, 28, 69, 103, 107 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Conjectured to be a permutation of the natural numbers.

LINKS

Table of n, a(n) for n=1..62.

Popular Computing (Calabasas, CA), Problem 146: Gcd, Vol. 4 (No. 45, Dec 1976), page PC45-4.

N. J. A. Sloane, Spirals showing initial terms of A257321-A257332

CROSSREFS

Cf. A257329, A257330, A257331, A257332.

Sequence in context: A179335 A097858 A084408 * A143345 A111679 A087174

Adjacent sequences:  A257344 A257345 A257346 * A257348 A257349 A257350

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Apr 30 2015

STATUS

approved

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Last modified April 18 22:08 EDT 2019. Contains 322237 sequences. (Running on oeis4.)