id:A112131 - OEIS Search Results

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Concatenate the consecutive increasing numbers starting with Harshad(n) and ending with Harshad(n+1).

+0
4

12, 23, 34, 45, 56, 67, 78, 89, 910, 101112, 12131415161718, 181920, 2021, 21222324, 24252627, 27282930, 30313233343536, 3637383940, 404142, 42434445, 45464748, 484950, 5051525354, 54555657585960, 60616263, 6364656667686970, 707172 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(11)=12131415161718 because the 11th Harshad is 12 and the 12th` `is 18 and we concatenate those with the increasing numbers between.`
	CROSSREFS	`Cf. A005349.` `Sequence in context: A035333 A001704 A127421 this_sequence A088997 A049852 A045532` `Adjacent sequences: A112128 A112129 A112130 this_sequence A112132 A112133 A112134`
	KEYWORD	`base,easy,nonn`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), Aug 27 2005`

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

AT&T Labs Research