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A360210
Indices of squares in A068869.
1
1, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16
OFFSET
1,2
COMMENTS
a(14) > 30000. - Michel Marcus, Jan 30 2023
EXAMPLE
5 is a term because A068869(5) = 1 is a square;
8 is a term because A068869(8) = 81 is a square.
PROG
(PARI) isok(n) = issquare((sqrtint(n!-1)+1)^2-n!); \\ Michel Marcus, Jan 30 2023
CROSSREFS
Cf. A068869.
Sequence in context: A299544 A039174 A016069 * A194283 A299546 A039128
KEYWORD
nonn,more
AUTHOR
STATUS
approved