id:A109448 - OEIS Search Results

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Numbers n such that the concatenation of consecutive increasing numbers beginning with Harshad(n) and ending with Harshad(n+1) is a Harshad number; or n such that A112131(n) is a Harshad number.

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1, 4, 9, 10, 21, 45, 48, 100, 102, 135, 144, 201, 228, 315, 320, 378, 399, 408, 736, 792, 803, 820, 832, 1000, 1035, 1044, 1056, 1088, 1101, 1128, 1215, 1233, 1308, 1431, 1720, 1908, 1926, 1962, 2001, 2028, 2052, 2119, 2208, 2210, 2223, 2241, 2618, 2620 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`a(5)=21 because 2+1+2+2+2+3+2+4 = 18 and 21222324/18 = 1179018.`
	CROSSREFS	`Cf. A005349.` `Sequence in context: A098144 A109412 A061766 this_sequence A062398 A030754 A077584` `Adjacent sequences: A109445 A109446 A109447 this_sequence A109449 A109450 A109451`
	KEYWORD	`base,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.

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