OFFSET
0,2
PROG
(PARI) {a(n) = my(k=1); while(ellanalyticrank(ellinit([0, 0, 0, 0, -k^2]))[1]<>n, k++); k}
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Seiichi Manyama, Jul 10 2019
STATUS
approved