id:A069507 - OEIS Search Results

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a(1) = 4; a(n) = smallest palindromic number of the form k*a(n-1) + 1 with k > 1.

+0
6

4, 9, 55, 111, 1111, 11111, 111111, 1111111, 11111111, 111111111, 1111111111, 11111111111, 111111111111, 1111111111111, 11111111111111, 111111111111111, 1111111111111111, 11111111111111111, 111111111111111111 (list; graph; listen)

	OFFSET	`0,1`
	FORMULA	`a(n) = {10^(n-1)-1}/9 for n > 3.`
	CROSSREFS	`Cf. A069505, A069506, A069508, A069509, A069510.` `Sequence in context: A060998 A009276 A086692 this_sequence A152284 A109717 A013571` `Adjacent sequences: A069504 A069505 A069506 this_sequence A069508 A069509 A069510`
	KEYWORD	`nonn,base`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 30 2002.`
	EXTENSIONS	`More terms from Patrick De Geest (pdg(AT)worldofnumbers.com), Jun 11 2003.`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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