id:A054842 - OEIS Search Results

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If n = a + 10 * b + 100 * c + 1000 * d + ... then a(n) = (2^a) * (3^b) * (5^c) * (7^d) * ...

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1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 3, 6, 12, 24, 48, 96, 192, 384, 768, 1536, 9, 18, 36, 72, 144, 288, 576, 1152, 2304, 4608, 27, 54, 108, 216, 432, 864, 1728, 3456, 6912, 13824, 81, 162, 324, 648, 1296, 2592, 5184, 10368, 20736, 41472, 243, 486, 972 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`a((10^k-1)/9) = Primorial (k)= A061509((10^k-1)/9). This is a rearrangement of whole numbers. a(m) = a(n) iff m = n. (Unlike A061509, in which a(n) = a(n*10^k)).) - Amarnath Murthy and Meenakshi Srikanth (amarnath_murthy(AT)yahoo.com), Jul 14 2003`
	EXAMPLE	`a(15)=96 because 3^1 * 2^5 = 3*32 = 96`
	CROSSREFS	`Cf. A054841, A085840.` `Sequence in context: A061509 A086066 A085941 this_sequence A101440 A126605 A072049` `Adjacent sequences: A054839 A054840 A054841 this_sequence A054843 A054844 A054845`
	KEYWORD	`base,nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Apr 11 2000`

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

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