A178500 - OEIS

A178500

a(n) = 10^n * signum(n).

0, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000, 10000000000, 100000000000, 1000000000000, 10000000000000, 100000000000000, 1000000000000000, 10000000000000000, 100000000000000000 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,2`
	COMMENTS	`a(n-1) is the minimum difference between an n-digit number (written in base 10, nonzero leading digit) and the product of its digits. For n > 1, it is also a number meeting that bound. See A070565. - Devin Akman, Apr 17 2019`
	LINKS	`Michael De Vlieger, Table of n, a(n) for n = 0..999` `Index entries for linear recurrences with constant coefficients, signature (10).`
	FORMULA	`a(n) = A011557(n) * A057427(n).` `For n > 0, a(n) = A011557(n).` `a(n) = 10 * A178501(n).` `a(n) = A000533(n) - 1.` `A061601(a(n)) = A109002(n+1).`
	MATHEMATICA	`Array[10^#Sign[#] &, 20, 0] ( Michael De Vlieger, Apr 21 2019 *)`
	CROSSREFS	`Cf. A000533, A011557, A057427, A061601, A070565, A109002, A155559, A178501.` `Partial sums of A063945.` `Sequence in context: A260521 A136873 A135655 * A178501 A011557 A138825` `Adjacent sequences: A178497 A178498 A178499 * A178501 A178502 A178503`
	KEYWORD	`nonn,easy`
	AUTHOR	`Reinhard Zumkeller, May 28 2010`
	STATUS	`approved`