A217422 - OEIS

A217422

Numbers of the form 2^r*17^s whose decimal representations are such that each digit 0-9 appears a prime number of times.

%I #22 May 13 2017 00:08:15

%S 981750581622330147995648,28801196957834700781586432,

%T 835992910761480393266512789504,7295132596707416278470844481536,

%U 76976152675689985407324172386304

%N Numbers of the form 2^r*17^s whose decimal representations are such that each digit 0-9 appears a prime number of times.

%C See formula section for more data. Others in cross-reference are similar and some hold more motivation in comments.

%F A217422(n) = 2^A217423(n)*17^A217424(n).

%e A217423(1)=47 and A217424(1)=8, so this sequence's first term is 2^47 * 17^8. It has in its decimal representation two copies each of the digits 0, 2, 3, 4, 6 and 7; and three copies each of 1, 5, 8 and 9.

%Y Cf. A217854, A217423, A217424, A217404, A217407, A217410, A217413, A217416, A217419, A217425, A217428, A217431.

%K nonn,base,less

%O 1,1

%A _James G. Merickel_, Oct 05 2012