OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
FORMULA
a(n) = A076605(2*n). - Amiram Eldar, Nov 03 2024
MATHEMATICA
Table[ Last[ Table[ # [[1]]] & /@ FactorInteger[n^2 - 1]], {n, 2, 150, 2}]
PROG
(PARI) a(n) = my(p = factor(4*n^2-1)[, 1]); p[#p]; \\ Amiram Eldar, Nov 03 2024
CROSSREFS
KEYWORD
nonn,easy,changed
AUTHOR
N. J. A. Sloane, Nov 29 2002
EXTENSIONS
Extended by Robert G. Wilson v, Dec 02 2002
STATUS
approved