OFFSET
2,1
COMMENTS
Product of n-th row in triangle A171637;
All terms greater than 3 are odd, composite and squarefree numbers, cf. A024556.
n is prime iff n is a factor of a(n).
Product of the distinct primes in the Goldbach partitions of 2n. - Wesley Ivan Hurt, Sep 29 2020
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 2..2000
FORMULA
PROG
(Haskell)
a238711 n = product $ filter ((== 1) . a010051') $
map (2 * n -) $ takeWhile (<= 2 * n) a000040_list
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Mar 06 2014
STATUS
approved