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A320678 Number of 3-element subsets of [n] having a prime element sum. 2
0, 1, 2, 6, 10, 18, 26, 37, 47, 62, 76, 96, 116, 143, 170, 205, 241, 285, 329, 382, 434, 495, 555, 627, 698, 781, 865, 962, 1059, 1168, 1276, 1397, 1517, 1652, 1786, 1936, 2086, 2253, 2419, 2600, 2779, 2974, 3168, 3378, 3588, 3818, 4048, 4296, 4543, 4809, 5073 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,3

LINKS

Alois P. Heinz, Table of n, a(n) for n = 3..500

CROSSREFS

Column k=3 of A282516.

Sequence in context: A281664 A330507 A290220 * A050844 A328960 A282428

Adjacent sequences:  A320675 A320676 A320677 * A320679 A320680 A320681

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Oct 19 2018

STATUS

approved

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Last modified October 27 06:31 EDT 2021. Contains 348271 sequences. (Running on oeis4.)