id:A133808 - OEIS Search Results

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Numbers that are primally tight, have 2 as first prime and weakly ascending powers.

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1, 2, 4, 6, 8, 16, 18, 30, 32, 36, 54, 64, 108, 128, 150, 162, 210, 216, 256, 324, 450, 486, 512, 648, 750, 900, 972, 1024, 1296, 1458, 1470, 1944, 2048, 2250, 2310, 2916, 3750, 3888, 4096, 4374, 4500, 5832, 6750, 7350, 7776, 8192, 8748, 10290, 11250 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`All numbers of the form 2^k1p_2^k2...*p_n^k_n, where k1 <= k2 <= ... <= k_n, and the p_i are the n first primes.` `Subset of A073491,A133810.`
	CROSSREFS	`Cf. A025487, A087980, A073491, A133809-A133813.` `Sequence in context: A073935 A073696 A058602 this_sequence A093109 A070034 A064408` `Adjacent sequences: A133805 A133806 A133807 this_sequence A133809 A133810 A133811`
	KEYWORD	`nonn`
	AUTHOR	`Olivier Gerard (ogerard(AT)ext.jussieu.fr), Sep 23, 2007`

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Last modified July 23 10:48 EDT 2008. Contains 142285 sequences.

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