

A217416


Numbers of the form 2^r*13^s whose decimal representations are such that each digit 09 appears a prime number of times.


12




OFFSET

1,1


COMMENTS

See the formula section for more data, and the other sequences in crossreference for similar and motivation.


LINKS



FORMULA



EXAMPLE

A217417(1)=10 and A217418(1)=20, so this sequence's first term can be simply written as 338^10 (338=2*13^2). It has two each of 0's, 1's, 5's, 6's, 7's and 8's; three each of 3's, 4's and 9's; and five 2's.


CROSSREFS

Cf. A217854, A217417, A217418, A217404, A217407, A217410, A217413, A217419, A217422, A217425, A217428, A217431.


KEYWORD

nonn,base,less


AUTHOR



STATUS

approved



