OFFSET
10,65
COMMENTS
a(n) is undefined for n = 0, 1 or 9.
LINKS
Jinyuan Wang, Table of n, a(n) for n = 10..5000
Andrew Bremner, Richard K. Guy, Richard J. Nowakowski, Which integers are representable as the product of the sum of three integers with the sum of their reciprocals?, Math. Comp. 61 (1993), 117-130.
Allan J. MacLeod, Knight's Problem
PROG
(PARI) {a(n) = ellanalyticrank(ellinit([0, n^2-6*n-3, 0, 16*n, 0]))[1]}
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Jul 14 2019
STATUS
approved