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A217413 Numbers of the form 2^r*11^s whose decimal representations are such that each digit 0-9 appears a prime number of times. 12

%I #17 Apr 07 2020 23:06:47

%S 380270922216319615655477248,804540132953535715766960128,

%T 808356196450619282354367102976,3705202243778559670466281109192704,

%U 29084192305393678777275954501779456

%N Numbers of the form 2^r*11^s whose decimal representations are such that each digit 0-9 appears a prime number of times.

%C See the formula section for more data, and the other sequences in cross-reference for similar sequences and motivation.

%F A217413(n) = 2^A217414(n) * 11^A217415(n).

%e A217414(1)=71 and A217415(1)=5, so this sequence's first term is 2^71 * 11^5. It has two each of 0's, 3's, 4's, 6's, 8's and 9's; three each of 1's, 5's and 7's; and five 2's.

%Y Cf. A217854, A217414, A217415, A217404, A217407, A217410, A217416, A217419, A217422, A217425, A217428, A217431.

%K nonn,base,less

%O 1,1

%A _James G. Merickel_, Oct 03 2012

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Last modified August 17 23:40 EDT 2024. Contains 375255 sequences. (Running on oeis4.)