A113591 Least multiple of composite(n), containing only composite digits (0,4,6,8,9).

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

Links

Table of n, a(n) for n=0..60.

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

Cf. A002808, A078240, A113590.

Sequence in context: A202260 A001744 A113624 * A029581 A202262 A202266

Adjacent sequences: A113588 A113589 A113590 * A113592 A113593 A113594

Keyword

base,easy,nonn

Author

Amarnath Murthy, Nov 07 2005

Extensions

Corrected and extended by R. J. Mathar, Aug 28 2007

Status

approved