|
|
A079447
|
|
Primes p such that there is an integer k satisfying p = floor(k*H(k)) where H(k) denotes the k-th harmonic number (i.e., H(k) = 1 + 1/2 + 1/3 + ... + 1/k).
|
|
0
|
|
|
2, 3, 5, 11, 29, 37, 41, 67, 71, 149, 181, 191, 197, 229, 241, 251, 257, 307, 353, 359, 383, 389, 401, 443, 449, 461, 479, 521, 557, 563, 569, 647, 653, 661, 673, 743, 769, 787, 827, 887, 1033, 1129
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
LINKS
|
|
|
EXAMPLE
|
10*Sum_{j=1..10} 1/j = 29.2896825..., hence 29 = floor(10*H(10)) and 29 is in the sequence.
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|