

A281336


a(n) is the smallest composite number having the same basen 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
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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: A121800 A121804 A293920 * A205164 A221011 A267964
Adjacent sequences: A281333 A281334 A281335 * A281337 A281338 A281339


KEYWORD

nonn,base


AUTHOR

Hans Havermann, Jan 20 2017


STATUS

approved



