A388423 - OEIS

A388423

Arithmetic mean of the primes with n decimal digits, rounded to nearest integer.

4, 50, 525, 5335, 53648, 538357, 5401599, 54152086, 542524496, 5433092232, 54394247910, 544466981844, 5449081882157, 54528423968124, 545608553153253, 5458911232865407, 54613952042126362, 546359589927712055, 5465559172809736132, 54673214889712335793, 546891220318121062227

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OFFSET

1,1

LINKS

Hugo Pfoertner, Table of n, a(n) for n = 1..26

FORMULA

a(n) = round(A077645(n)/A006879(n)).

MATHEMATICA

a[n_]:=Module[{plim=PrimePi[NextPrime[10^n, -1]], pllim=PrimePi[NextPrime[10^(n-1)]]}, Round[Mean[Prime[Range[pllim, plim]]]]]; Array[a, 8] (* James C. McMahon, Sep 17 2025 *)

CROSSREFS

Cf. A006879, A077645, A309329, A388421, A388422.

Sequence in context: A028455 A232731 A215792 * A280358 A114480 A123356

Adjacent sequences: A388420 A388421 A388422 * A388424 A388425 A388426

KEYWORD

nonn,base

AUTHOR

Hugo Pfoertner, Sep 17 2025

STATUS

approved