A373645 - OEIS

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A373645

The smallest number whose prime factor concatenation, as well as the number itself, when written in base n, contains all digits 0,1,...,(n-1).

2, 11, 114, 894, 13155, 127041, 2219826, 44489860, 1023485967, 26436195405, 755182183459, 23609378957430, 802775563829902, 29480898988179429, 1162849454580682365

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OFFSET

2,1

COMMENTS

For base 2 and base 3 the number is prime; are there other bases where this is also true?

LINKS

Table of n, a(n) for n=2..16.

EXAMPLE

a(5) = 894 = 12034_5 which contains all the digits 0..4, and 894 = 2 * 3 * 149 = 2_5 * 3_5 * 1044_5, and the factors contain all digits 0..4.

a(10) = 1023485967 which contains all digits 0..9, and 1023485967 = 3 * 3 * 7 * 16245809, and the factors contain all digits 0..9.

a(15) = 29480898988179429 = 102345C86EA7BD9_15 which contains all the digits 0..E, and 29480898988179429 = 3 * 7 * 17 * 139 * 594097474723 = 3_15 * 7_15 * 12_15 * 94_15 * 106C1A8B5ED_15, and the factors contain all digits 0..E.

CROSSREFS

Cf. A372309, A358003, A372384, A372280, A372295, A372249, A027746.

Sequence in context: A371697 A373795 A286869 * A181168 A269082 A378016

Adjacent sequences: A373642 A373643 A373644 * A373646 A373647 A373648

KEYWORD

nonn,base,more

AUTHOR

Scott R. Shannon, Jun 12 2024

STATUS

approved