OFFSET
1,1
LINKS
Allan J. MacLeod, Knight's Problem
FORMULA
A309142(a(n)) = 2.
PROG
(PARI) for(k=10, 1e3, if(ellanalyticrank(ellinit([0, k^2-6*k-3, 0, 16*k, 0]))[1]==2, print1(k", ")))
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Jul 14 2019
STATUS
approved