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A281336 a(n) is the smallest composite number having the same base-n digits (both type and quantity) as its prime factors (with multiplicity). 2
159, 7847, 1135, 83494, 57, 30057, 85, 72646, 1255, 18193, 185, 101212405, 4119, 63791, 88357, 31054582, 489, 4196517, 451, 4598494, 13315, 1012985, 679, 7009758597, 26533, 2884373, 985, 646372334, 1057, 989775393, 1285, 1395750166, 179503, 73294351, 1387 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

COMMENTS

A278981(n) <= A281336(n)

LINKS

Table of n, a(n) for n=2..36.

EXAMPLE

In base 2: The digits of 159 (10011111) are the same type and quantity as the total of those in its prime factors, 3 (11) and 53 (110101); 2 zeros, 6 ones.

In base 26: The digits of 26533 (1,13,6,13) are the same type and quantity as the total of those in its prime factors, 13 (13), 13 (13), and 157 (6,1); 1 one, 1 six, 2 thirteens.

CROSSREFS

Cf. A278981, A280928, A281335.

Sequence in context: A232408 A121800 A121804 * A205164 A221011 A267964

Adjacent sequences:  A281333 A281334 A281335 * A281337 A281338 A281339

KEYWORD

nonn,base

AUTHOR

Hans Havermann, Jan 20 2017

STATUS

approved

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Last modified June 27 02:59 EDT 2017. Contains 288777 sequences.