id:A121610 - OEIS Search Results

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Composite numbers that can be written as concatenation of two composite numbers in decimal representation.

+0
4

44, 46, 48, 49, 64, 66, 68, 69, 84, 86, 88, 94, 96, 98, 99, 104, 106, 108, 124, 126, 128, 129, 144, 146, 148, 154, 156, 158, 159, 164, 166, 168, 169, 184, 186, 188, 189, 204, 206, 208, 209, 214, 216, 218, 219, 224, 226, 228, 244, 246, 248, 249, 254, 256, 258 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`A002808(328) = 408 = 4010+8 = A002808(27)10+A002808(3),` `therefore 408 is a term: a(99) = 408;` `A002808(331) = 412 = 4100+12 = A002808(1)100+A002808(6),` `therefore 412 is a term: a(100) = 412.`
	CROSSREFS	`Cf. A121609, A105184, A121608.` `Sequence in context: A085519 A112815 A038400 this_sequence A063837 A061757 A088066` `Adjacent sequences: A121607 A121608 A121609 this_sequence A121611 A121612 A121613`
	KEYWORD	`nonn,base`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 10 2006`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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