id:A055560 - OEIS Search Results

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Base numbers of 9-gonal palindromic numbers.

+0
2

1, 2, 6, 12, 17, 44, 74, 139, 1123, 1411, 2101, 4070, 11323, 11472, 12870, 16318, 16853, 18729, 52642, 132619, 435644, 446904, 168566853, 350096787, 521037077, 708609429, 1121857192, 1641773578, 11947307367, 21633254881, 75356090494 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`P. De Geest, Palindromic nonagonals`
	FORMULA	`9-gonal numbers are of the form (n(7n-5))/2.`
	CROSSREFS	`Cf. A001106, A082723.` `Adjacent sequences: A055557 A055558 A055559 this_sequence A055561 A055562 A055563` `Sequence in context: A084790 A130237 A053457 this_sequence A108727 A026229 A043343`
	KEYWORD	`nonn,base`
	AUTHOR	`J. Lowell (jhbubby(AT)avana.net), Jul 10 2000`
	EXTENSIONS	`Edited and extended by Patrick De Geest (pdg(AT)worldofnumbers.com), Apr 13 2003.`

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Last modified May 17 13:36 EDT 2008. Contains 139908 sequences.

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