A135057 - OEIS

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A135057

Largest semiprime whose prime factors add up to 10^n.

25, 2491, 249919, 24993439, 2499984871, 249999996751, 24999999992431, 2499999999940951, 249999999999995239, 24999999999999996031, 2499999999999999964279, 249999999999999999946639 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	LINKS	`Lekraj Beedassy (blekraj(AT)yahoo.com), Feb 11 2008, Table of n, a(n) for n = 1..37`
	FORMULA	`a(n) = A124450(n)(10^n - A124550(n)) {= A137611(n)A137612(n) for n>1}` `a(n) = 100^n/4-(A124049(n))^2 - Zak Seidov (zakseidov(AT)yahoo.com), Feb 15 2008.`
	CROSSREFS	`Sequence in context: A197408 A197430 A195272 * A167036 A145246 A082488` `Adjacent sequences: A135054 A135055 A135056 * A135058 A135059 A135060`
	KEYWORD	`nonn`
	AUTHOR	`Lekraj Beedassy (blekraj(AT)yahoo.com), Feb 11 2008`

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Last modified February 14 01:35 EST 2012. Contains 205567 sequences.