id:A082779 - OEIS Search Results

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a(1) = 4, a(n) = smallest palindromic multiple of a(n-1) obtained by inserting digits anywhere in a(n-1).

+0
9

4, 44, 484, 48884, 488888884, 48888888888888884, 488888888888888888888888888888884 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`a(n) = 4 followed by (2^(n-2) -1) 8's followed by a 4. a(n+1)/a(n) = 10^k + 1 where k = 2^(n-2) -1.`
	CROSSREFS	`Cf. A082776, A082777, A082778, A082780.` `Sequence in context: A002278 A112897 A087813 this_sequence A053315 A005721 A056063` `Adjacent sequences: A082776 A082777 A082778 this_sequence A082780 A082781 A082782`
	KEYWORD	`base,more,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 19 2003`

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Last modified September 8 08:06 EDT 2008. Contains 143486 sequences.