login
A373864
Reduced Collatz function R applied to the numbers 6n+5: a(n) = R(6n+5), where R(k) = (3k+1)/2^r, with r as large as possible.
1
1, 17, 13, 35, 11, 53, 31, 71, 5, 89, 49, 107, 29, 125, 67, 143, 19, 161, 85, 179, 47, 197, 103, 215, 7, 233, 121, 251, 65, 269, 139, 287, 37, 305, 157, 323, 83, 341, 175, 359, 23, 377, 193, 395, 101, 413, 211, 431, 55, 449, 229, 467, 119
OFFSET
0,2
FORMULA
a(n) = A000265(A017257(n)).
MATHEMATICA
A373864[n_] := #/2^IntegerExponent[#, 2] & [9*n + 8];
Array[A373864, 100, 0] (* Paolo Xausa, Aug 19 2024 *)
PROG
(PARI) a(n) = n=9*n+8; n>>valuation(n, 2);
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Jonas Kaiser, Jun 19 2024
STATUS
approved