A366894 a(n) = A336699(A163511(n)).

1, 1, 1, 1, 1, 7, 1, 1, 1, 3, 7, 1, 1, 1, 1, 1, 1, 61, 3, 5, 7, 1, 1, 29, 1, 5, 1, 1, 1, 1, 1, 1, 1, 23, 61, 391, 3, 5, 5, 13, 7, 101, 1, 43, 1, 29, 29, 67, 1, 1, 5, 1, 1, 1, 1, 1, 1, 7, 1, 5, 1, 1, 1, 1, 1, 547, 23, 977, 61, 391, 391, 1401, 3, 127, 5, 19, 5, 13, 13, 23, 7, 39, 101, 221, 1, 43, 43, 67, 1, 371, 29, 25, 29

Offset

0,6

Links

Antti Karttunen, Table of n, a(n) for n = 0..16384

Formula

a(n) = A351565(A324186(n)).

Prog

(PARI)
A163511(n) = if(!n, 1, my(p=2, t=1); while(n>1, if(!(n%2), (t*=p), p=nextprime(1+p)); n >>= 1); (t*p));
A000265(n) = (n>>valuation(n, 2));
A336699(n) = A000265(1+A000265(sigma(A000265(n))));
A366894(n) = A336699(A163511(n));

Crossrefs

Cf. A000265, A000593, A163511, A324186, A336699, A351565, A366895 (rgs-transform).

Sequence in context: A350071 A336844 A072101 * A088840 A348048 A348985

Adjacent sequences: A366891 A366892 A366893 * A366895 A366896 A366897

Keyword

nonn

Author

Antti Karttunen, Jan 03 2024

Status

approved