id:A109686 - OEIS Search Results

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Smallest number beginning with the digits of n that has exactly n prime factors (counted with multiplicity).

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11, 21, 30, 40, 500, 64, 704, 864, 9072, 1024, 11264, 120832, 133120, 143360, 1505280, 163840, 1720320, 18063360, 1966080, 20054016, 210567168, 22020096, 231211008, 243269632, 254803968, 2600468480, 2751463424, 28028436480, 2952790016, 30576476160, 31138512896, 32614907904, 330225942528 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(5)=500 since 500 has prime factorization 500=22555 (5 factors) and begins with 5 and is the smallest such number`
	CROSSREFS	`Sequence in context: A050718 A125164 A101223 this_sequence A077522 A049201 A068633` `Adjacent sequences: A109683 A109684 A109685 this_sequence A109687 A109688 A109689`
	KEYWORD	`base,nonn`
	AUTHOR	`Erich Friedman (efriedma(AT)stetson.edu), Aug 07 2005`
	EXTENSIONS	`a(24)-a(33) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Apr 27 2008`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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