A385380 - OEIS

A385380

Partial products of the sequence nonprime powers of primes (A025475).

1, 4, 32, 288, 4608, 115200, 3110400, 99532800, 4877107200, 312134860800, 25282923724800, 3059233770700800, 382404221337600000, 48947740331212800000, 8272168115974963200000, 2010136852181916057600000, 514595034158570510745600000, 148717964871826877605478400000

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OFFSET

1,2

COMMENTS

Indices of records in A385379.

a(n) is the least index k such that A385379(k) = n-1.

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..217

Index entries for sequences related to powerful numbers.

FORMULA

a(n) = Product_{k=1..n} A025475(k).

MATHEMATICA