|
|
|
|
9, 17, 18, 34, 36, 49, 67, 68, 71, 72, 81, 97, 98, 134, 136, 142, 144, 147, 162, 193, 194, 196, 268, 271, 272, 283, 284, 288, 291, 293, 294, 324, 386, 388, 392, 536, 541, 542, 544, 566, 568, 576, 579, 582, 586, 587, 588, 647, 648, 679, 772, 776, 784, 961, 1072, 1082, 1084, 1087, 1088, 1132, 1136, 1151, 1152, 1158, 1163
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
If k is a term, then also 2*k is present in this sequence.
|
|
LINKS
|
|
|
PROG
|
(PARI)
A331410(n) = { my(f=factor(n)); sum(k=1, #f~, if(2==f[k, 1], 0, f[k, 2]*(1+A331410(f[k, 1]+1)))); };
A336361(n) = if(!bitand(n, n-1), 0, 1+A336361(sigma(n>>valuation(n, 2))));
|
|
CROSSREFS
|
Positions of negative terms in A347249.
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|