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A089536 Lesser prime factor of semiprimes in A089535. 3
2, 29, 31, 2, 7, 7, 5, 1188359, 1307, 165864626101044727, 36120307175753, 9772772454840984668059, 8944440848667088469951, 3041407, 6446147951, 48370466980471484946806147635774599979591, 24025609733, 11, 15866068029777944368693, 50031370538856249715800928172618839 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..20.

FORMULA

a(n) = A020639(A089535(n)). - Michel Marcus, Jul 31 2021

CROSSREFS

Cf. A020639, A085745, A089535, A089537.

Sequence in context: A153655 A153657 A140152 * A019379 A107166 A041969

Adjacent sequences:  A089533 A089534 A089535 * A089537 A089538 A089539

KEYWORD

nonn

AUTHOR

Ray Chandler, Nov 08 2003

EXTENSIONS

a(14) from Donovan Johnson, Sep 05 2008

Offset changed to 1 and more terms from Jinyuan Wang, Jul 30 2021

STATUS

approved

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Last modified October 27 19:59 EDT 2021. Contains 348289 sequences. (Running on oeis4.)