A281335 - OEIS

A281335

a(n) is the smallest composite number having the same base-n digits (both type and quantity) as the primes and greater-than-one exponents in its factorization.

25, 16, 25, 2312, 16, 7136, 27, 72646, 25, 4617, 169, 384, 4119, 3875, 289, 182585, 128, 556875, 451, 49, 529, 1012985, 679, 72420352, 42752, 585903, 841, 64, 961, 118375, 1285, 2944, 179503, 4624625, 1369

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OFFSET

2,1

LINKS

Table of n, a(n) for n=2..36.

EXAMPLE

In base 2: The digits of 25 (11001) are the same type and quantity as the total of the prime 5 (101) and its exponent 2 (10) in 25's factorization; 2 zeros, 3 ones.

In base 26: The digits of 42752 (2,11,6,8) are the same type and quantity as the total of the prime 2 (2) and its exponent 8 (8) and the prime 167 (6,11) in 42752's factorization; 1 each of two, six, eight, eleven.

CROSSREFS

Cf. A273260, A281336.

Sequence in context: A093539 A339773 A040602 * A028937 A215537 A104790

Adjacent sequences: A281332 A281333 A281334 * A281336 A281337 A281338

KEYWORD

nonn,base

AUTHOR

Hans Havermann, Jan 20 2017

STATUS

approved