A364564 Largest prime factor computed for those odd numbers k for which A156552(k) < k.

1, 3, 5, 3, 5, 7, 5, 3, 7, 5, 7, 11, 7, 5, 11, 3, 13, 11, 7, 11, 5, 5, 13, 7, 11, 13, 7, 17, 7, 13, 17, 5, 11, 3, 7, 13, 11, 17, 11, 7, 19, 13, 7, 13, 17, 11, 5, 11, 5, 17, 13, 7, 13, 11, 13, 7, 11, 17, 7, 13, 17, 11, 5, 19, 13, 17, 19, 5, 11, 13, 3, 7, 19, 17, 13, 11, 17, 13, 11, 17, 7, 11, 19, 17, 7, 19, 13, 13

Offset

1,2

Comments

These primes must stay reasonably small, but how small?

See also the example section of A364551.

Links

Antti Karttunen, Table of n, a(n) for n = 1..13739

Formula

a(n) = A006530(A364561(n)).

Crossrefs

Cf. A006530, A156552, A364551, A364561.

Sequence in context: A253027 A249384 A228446 * A188889 A219604 A296489

Adjacent sequences: A364561 A364562 A364563 * A364565 A364566 A364567

Keyword

nonn

Author

Antti Karttunen, Jul 28 2023

Status

approved