A054642 - OEIS

This site is supported by donations to The OEIS Foundation.

A054642

Distinct values of GCD of divisor sum of primorials and primorial itself: GCD[A002110(n), A000203(A002110(n))].

1, 6, 42, 210, 3990, 43890, 1360590, 23130030, 855811110, 11125544430, 255887521890, 20215114229310, 828819683401710, 24035770818649590, 2331469769409010230, 123567897778677542190, 5313419604483134314170 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	COMMENTS	`Below n=100, 30 values arise and if high enough are divisible by large primorials. E.g. for n=1,..30 Mod[a(n),510510]= {1,6,42,210,3990,43890,339570,157080,196350,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}`
	CROSSREFS	`Cf. A000203, A002110, A054640, A054641.` `Sequence in context: A180806 A062136 A047663 * A082139 A180286 A054613` `Adjacent sequences: A054639 A054640 A054641 * A054643 A054644 A054645`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), May 15 2000`

Content is available under The OEIS End-User License Agreement .

Last modified February 17 13:28 EST 2012. Contains 206031 sequences.