A219452 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A219452

First position of a plateau of length n in the product-of-exponents function A005361.

2

2, 4, 843, 74848, 671345, 8870024

(list; graph; refs; listen; history; text; internal format)

OFFSET

2,1

COMMENTS

The smallest index k such that A005361(k+1) = A005361(k+2) = ... = A005361(k+n).

a(8) is conjectured to be 1770019255373287038727484868192109228823.

LINKS

Table of n, a(n) for n=2..7.

J.-M. de Koninck, F. Luca, The product of exponents in the factorization of consecutive integers, Mathematika 55 (2009) 59-65

CROSSREFS

Sequence in context: A203509 A009562 A045647 * A102064 A085638 A134718

Adjacent sequences: A219449 A219450 A219451 * A219453 A219454 A219455

KEYWORD

nonn

AUTHOR

R. J. Mathar, Nov 20 2012

STATUS

approved