login
A366797
Number of odd divisors permuted by A163511: a(n) = A001227(A163511(n)).
4
1, 1, 1, 2, 1, 3, 2, 2, 1, 4, 3, 3, 2, 4, 2, 2, 1, 5, 4, 4, 3, 6, 3, 3, 2, 6, 4, 4, 2, 4, 2, 2, 1, 6, 5, 5, 4, 8, 4, 4, 3, 9, 6, 6, 3, 6, 3, 3, 2, 8, 6, 6, 4, 8, 4, 4, 2, 6, 4, 4, 2, 4, 2, 2, 1, 7, 6, 6, 5, 10, 5, 5, 4, 12, 8, 8, 4, 8, 4, 4, 3, 12, 9, 9, 6, 12, 6, 6, 3, 9, 6, 6, 3, 6, 3, 3, 2, 10, 8, 8, 6, 12, 6, 6
OFFSET
0,4
FORMULA
a(n) = 2*A366873(n) - A324186(n).
PROG
(PARI)
A001227(n) = numdiv(n>>valuation(n, 2));
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));
CROSSREFS
Cf. A001227, A163511, A366798 (rgs-transform).
Cf. also A324186, A366873.
Sequence in context: A080801 A336391 A366798 * A365394 A365391 A336390
KEYWORD
nonn
AUTHOR
Antti Karttunen, Oct 27 2023
STATUS
approved