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A261211 Column k=1 of A261297. 2
2, 1, 4, 2, 4, 3, 4, 3, 5, 5, 6, 7, 6, 7, 11, 11, 6, 11, 8, 11, 11, 13, 8, 13, 17, 17, 17, 17, 9, 19, 9, 19, 19, 23, 23, 23, 10, 23, 29, 29, 12, 29, 12, 29, 29, 29, 12, 29, 31, 31, 37, 37, 14, 37, 37, 37, 37, 37, 14, 41, 15, 41, 41, 41, 41, 43, 15, 43, 47, 47 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..10000

E. Angelini, Vertices, edges, primes and non-primes, SeqFan list, Sept. 16, 2015.

CROSSREFS

Cf. A261297.

Sequence in context: A277687 A065295 A296604 * A233521 A035685 A205509

Adjacent sequences:  A261208 A261209 A261210 * A261212 A261213 A261214

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Sep 21 2015

STATUS

approved

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Last modified August 6 09:02 EDT 2020. Contains 336228 sequences. (Running on oeis4.)