id:A104386 - OEIS Search Results

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Numbers n such that average of n-th and (n+1)-th primes is a repdigit.

+0
4

2, 3, 4, 25, 29, 603, 6363181, 21366409911 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Corresponding primes A104387, A104388, repdigits A104389. What is the next term?`
	FORMULA	`(p[n]+p[n+1])/2 = repdigit`
	CROSSREFS	`Cf. A054268, A104387 - A104389.` `Adjacent sequences: A104383 A104384 A104385 this_sequence A104387 A104388 A104389` `Sequence in context: A055006 A139050 A043309 this_sequence A044906 A141565 A098549`
	KEYWORD	`more,nonn,base`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Mar 04 2005`
	EXTENSIONS	`One more term from Giovanni Resta (g.resta(AT)iit.cnr.it), Apr 05 2006`

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Last modified October 16 00:31 EDT 2008. Contains 145098 sequences.