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A217416 Numbers of the form 2^r*13^s whose decimal representations are such that each digit 0-9 appears a prime number of times. 12
19461082905477938625332224, 1493825030770756769826391724130304, 1341437769548771819714842333610521088, 1888426137230419620556768936800026624 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
See the formula section for more data, and the other sequences in cross-reference for similar and motivation.
LINKS
FORMULA
a(n) = 2^A217417(n) * 13^A217418(n).
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
Sequence in context: A009190 A095444 A309072 * A358418 A133849 A343357
KEYWORD
nonn,base,less
AUTHOR
James G. Merickel, Oct 03 2012
STATUS
approved

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Last modified May 19 10:22 EDT 2024. Contains 372683 sequences. (Running on oeis4.)