id:A093472 - OEIS Search Results

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(2n+1)-digit anti-palindromic numbers or numberdromes, whose first and last digits add to ten, second and next-to-last add to ten, and so on with the central digit a 5.

+0
1

159, 258, 357, 456, 555, 654, 753, 852, 951, 11599, 12589, 13579, 14569, 15559, 16549, 17539, 18529, 19519, 21598, 22588, 23578, 24568, 25558, 26548, 27538, 28528, 29518, 31597, 32587, 33577, 34567, 35557, 36547, 37537, 38527, 39517 (list; graph; listen)

	OFFSET	`0,1`
	FORMULA	`a(n) = (10^(m+1))n+5(10^m)+(10^m-n)`
	EXAMPLE	`a(1) = 159 because at least three digits are required, so that n = 1, m = 1 yeilds a(1) = 100+50+(10-1) = 159`
	CROSSREFS	`Cf. A083678.` `Adjacent sequences: A093469 A093470 A093471 this_sequence A093473 A093474 A093475` `Sequence in context: A056088 A116638 A045260 this_sequence A090948 A121800 A121804`
	KEYWORD	`easy,nonn,base`
	AUTHOR	`Michael Joseph Halm (hierogamous(AT)lycos.com), May 13 2004`

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Last modified October 13 09:05 EDT 2008. Contains 145008 sequences.

AT&T Labs Research