A217423 -id:A217423 - cp's OEIS frontend

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.

981750581622330147995648, 28801196957834700781586432, 835992910761480393266512789504, 7295132596707416278470844481536, 76976152675689985407324172386304

Offset: 1

James G. Merickel, Oct 05 2012

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

			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.

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

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

A217424 17-adic valuation of A217422.

Original entry on oeis.org

8, 18, 16, 6, 22, 3, 6, 16, 32, 27, 2, 727

Offset: 1

James G. Merickel, Oct 03 2012

A217422 consists of numbers of the form (2^r)*(17^s). This sequence holds the s values.

Cf. A217422, A217423.

a(12) added by James G. Merickel, Oct 07 2012

cp's OEIS Frontend

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.

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