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A077621 Squarefree numbers occurring more than once in A076734. 3
6, 10, 26, 30, 51, 66, 70, 78, 102, 122, 130, 154, 165, 174, 177, 182, 190, 210, 222, 238, 246, 266, 273, 282, 285, 291, 310, 318, 330, 345, 357, 362, 366, 370, 390, 399, 406, 418, 426, 429, 438, 455, 462, 483, 510, 518, 530, 533, 534, 546, 555, 561, 570 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A077618(a(n))>1;

Primorials are a subsequence, see A077622.

LINKS

Table of n, a(n) for n=1..53.

CROSSREFS

Cf. A077619, A077620.

Sequence in context: A109099 A109095 A323107 * A298736 A324617 A287989

Adjacent sequences:  A077618 A077619 A077620 * A077622 A077623 A077624

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Nov 12 2002

STATUS

approved

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Last modified May 25 11:27 EDT 2020. Contains 334592 sequences. (Running on oeis4.)