A360210 Indices of squares in A068869.

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

Links

Table of n, a(n) for n=1..13.

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

Adjacent sequences: A360207 A360208 A360209 * A360211 A360212 A360213

Keyword

nonn,more

Author

Alexander R. Povolotsky, Jan 29 2023

Status

approved