OFFSET
1,28
LINKS
Seiichi Manyama, Table of n, a(n) for n = 1..1000
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