id:A057139 - OEIS Search Results

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Odd number of digits palindrome based on sequential digits.

+0
4

1, 121, 12321, 1234321, 123454321, 12345654321, 1234567654321, 123456787654321, 12345678987654321, 1234567890987654321, 123456789010987654321, 12345678901210987654321 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n) = 10^nA057137(n-1)+A057138(n) = 10^(n-1)A057137(n)+A057138(n-1)`
	CROSSREFS	`Alternative progression for n >= 10 compared with A002477.` `Sequence in context: A079215 A137466 A062689 this_sequence A002477 A068117 A080162` `Adjacent sequences: A057136 A057137 A057138 this_sequence A057140 A057141 A057142`
	KEYWORD	`base,easy,nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Aug 12 2000`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

AT&T Labs Research