A344764 a(n) = gcd(n, A011772(n)).

1, 1, 1, 1, 1, 3, 1, 1, 1, 2, 1, 4, 1, 7, 5, 1, 1, 2, 1, 5, 3, 11, 1, 3, 1, 2, 1, 7, 1, 15, 1, 1, 11, 2, 7, 4, 1, 19, 3, 5, 1, 2, 1, 4, 9, 23, 1, 16, 1, 2, 17, 13, 1, 27, 5, 8, 3, 2, 1, 15, 1, 31, 9, 1, 5, 11, 1, 4, 23, 10, 1, 9, 1, 2, 3, 4, 7, 6, 1, 16, 1, 2, 1, 12, 17, 43, 29, 8, 1, 5, 13, 23, 3, 47, 19, 3, 1, 2

Offset

1,6

Links

Antti Karttunen, Table of n, a(n) for n = 1..16384

Antti Karttunen, Data supplement: n, a(n) computed for n = 1..65537

Formula

a(n) = gcd(n, A011772(n)) = gcd(A011772(n), A344763(n)) = gcd(n, A344763(n)).

Prog

(PARI) A344764(n) = gcd(n, A011772(n));

Crossrefs

Cf. A011772, A344763, A344766.

Sequence in context: A030370 A100808 A010277 * A359635 A065372 A015137

Adjacent sequences: A344761 A344762 A344763 * A344765 A344766 A344767

Keyword

nonn,look

Author

Antti Karttunen, May 30 2021

Status

approved