id:A128268 - OEIS Search Results

Search: id:A128268

Displaying 1-1 of 1 results found.

page 1

a(0)=1. a(n) = LCM((number of earlier terms which are coprime to n),(sum of the earlier terms which are coprime to n)).

+0
3

1, 1, 2, 12, 2, 90, 2, 770, 2, 5460, 2, 27870, 2, 86268, 2, 144, 2, 120632, 2, 4584054, 2, 1568502, 2, 147057998, 2, 1073923452, 2, 1324614852, 2, 74007713886, 2, 226457341710, 2, 735893320, 2, 2038112823132, 2, 86649033201030, 2, 4415363800 (list; graph; listen)

	OFFSET	`0,3`
	LINKS	`Diana Mecum, Table of n, a(n) for n = 0..149` `Leroy Quet, Home Page (listed in lieu of email address)`
	EXAMPLE	`Every term among {a(0),a(1),...a(6)} is coprime to 7. There are 7 such terms. And the sum of these terms is 110. So a(8) = LCM(7,110) = 770.`
	CROSSREFS	`Cf. A128267, A128269.` `Sequence in context: A075180 A167164 A010239 this_sequence A012626 A012629 A082827` `Adjacent sequences: A128265 A128266 A128267 this_sequence A128269 A128270 A128271`
	KEYWORD	`nonn`
	AUTHOR	`Leroy Quet Feb 22 2007`
	EXTENSIONS	`More terms from Diana Mecum (diana.mecum(AT)gmail.com), Jun 14 2007`

page 1

Search completed in 0.002 seconds

Last modified December 6 19:58 EST 2009. Contains 170429 sequences.

AT&T Labs Research