OFFSET
1,1
COMMENTS
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..31
Antti Karttunen, PARI program
EXAMPLE
For rows n=1..6, 9 & 10 nothing is listed, as those rows are empty.
Row for n=7 has just one term: 1547371 (= 7^2 * 23 * 1373). Note that A003415(1547371) = 510510 = A002110(7).
Row for n=8 has just one term: 79332523 (= 17^2 * 277 * 991).
Row for n=11 has two terms:
1102527599503 (= 11^2 * 11071 * 823033),
25336943536819 (= 157 * 743 * 5749 * 37781).
Row for n=12 has nine terms:
25962012375103 (= 7^2 * 8597 * 61630451),
25970380120783 (= 7^2 * 41387 * 12806141),
66702554987143 (= 19^2 * 167 * 1106416889),
526285951027003 (= 73 * 3919 * 7013 * 262313),
927949814519899 (= 269 * 271 * 1697 * 7501033),
7777707036642079 (= 2203 * 2791 * 7349 * 172127),
9584173681667203 (= 2131 * 5953 * 7901 * 95621),
13082430772438171 (= 3109 * 5861 * 24421 * 29399),
22101822021783739 (= 8783 * 11777 * 13921 * 15349).
Row for n=13 has 18 terms, and begins with:
4958985803436403 (= 37^2 * 137 * 26440450451),
and ends with:
3206697143570677543 (= 36899 * 41983 * 45233 * 45763).
PROG
(PARI) \\ See the attached PARI-program
CROSSREFS
KEYWORD
nonn,hard,tabf
AUTHOR
Antti Karttunen, Jan 09 2024
STATUS
approved