id:A061104 - OEIS Search Results

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Smallest number whose digit sum is n^2.

+0
4

0, 1, 4, 9, 79, 799, 9999, 499999, 19999999, 999999999, 199999999999, 49999999999999, 9999999999999999, 7999999999999999999, 7999999999999999999999, 9999999999999999999999999 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`a(n) =((n^2 mod 9)+ 1)*10^floor[n^2/9]-1. - Henry Bottomley (se16(AT)btinternet.com), Apr 24 2001`
	EXAMPLE	`a(5) = 799, 7+9+9 = 25 = 5^2.`
	CROSSREFS	`Cf. A051885, A061105.` `Adjacent sequences: A061101 A061102 A061103 this_sequence A061105 A061106 A061107` `Sequence in context: A100517 A041597 A041030 this_sequence A082381 A077530 A115551`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 20 2001`

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Last modified October 7 08:31 EDT 2008. Contains 144667 sequences.

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