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A113624
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Highly composite numbers containing only composite digits (0,4,6,8,9).
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0
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4, 6, 8, 9, 40, 48, 49, 60, 64, 80, 84, 90, 96, 98, 400, 448, 480, 486, 490, 600, 640, 648, 686, 800, 840, 864, 896, 900, 960, 980, 4000, 4096, 4480, 4608, 4800, 4860, 4900, 6000, 6048, 6400, 6480, 6804, 6860, 8000, 8064, 8400, 8640, 8960, 9000, 9408, 9600
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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EXAMPLE
| 96 is a term as 96 = 2^5*3 and contains digits 9,6 both composite. 96 is a member of A002473.
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MATHEMATICA
| Select[Select[Range[2, 10000], FactorInteger[ # ][[ -1]][[1]] <= 7 &], DigitCount[ # ][[1]]+DigitCount[ # ][[2]]+DigitCount[ # ][[3]]+DigitCount[ # ][[5]]+ DigitCount[ # ][[7]] == 0 &] - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Apr 11 2006
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CROSSREFS
| Cf. A002473, A113623.
Sequence in context: A073866 A202260 A001744 * A113591 A029581 A202262
Adjacent sequences: A113621 A113622 A113623 * A113625 A113626 A113627
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KEYWORD
| base,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 10 2005
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EXTENSIONS
| More terms from Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Apr 11 2006
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