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A113591
Least multiple of composite(n), containing only composite digits (0,4,6,8,9).
1
0, 4, 6, 8, 9, 40, 48, 84, 60, 48, 90, 40, 84, 44, 48, 400, 468, 486, 84, 60, 64, 66, 68, 490, 468, 494, 468, 40, 84, 44, 90, 46, 48, 49, 400, 408, 468, 486, 440, 448, 684, 406, 60, 496, 6048, 64, 4680, 66, 68, 69, 490, 648, 444, 600, 608, 4004, 468, 80, 486, 984, 84
OFFSET
0,2
COMMENTS
The sequence A002808 is extended with A002808(0)=0 to define "composite" here. Every term occurs in A001744. - R. J. Mathar, Aug 28 2007
FORMULA
a(n) = A078240(A002808(n)) for n > 0. - Andrew Howroyd, Sep 17 2024
EXAMPLE
a(7) = 84, composite (7) =14, term corresponding to 14 is 84.
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Amarnath Murthy, Nov 07 2005
EXTENSIONS
Corrected and extended by R. J. Mathar, Aug 28 2007
STATUS
approved