|
| |
|
|
A261142
|
|
Numbers n such that n, p=prime(n) and q=prime(p) have the same sum of digits.
|
|
0
|
|
|
|
88, 248, 826, 1417, 1571, 1595, 3682, 3928, 4448, 5089, 5137, 6479, 7754, 8038, 8384, 8461, 9257, 9640, 10393, 10825, 10922, 11878, 13294, 14290, 14767, 14941, 15977, 16786, 17684, 17777, 17935, 18437, 18677, 19495, 20497, 20555, 21649, 22487, 23239, 23396
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
COMMENTS
|
Hence both p and q are Honaker primes (A033548) and both n and p are terms in A033549.
|
|
|
LINKS
|
|
|
|
EXAMPLE
|
n=88, p=prime(n)=457 and q=prime(p)=3229 have the same sum of digits=16;
n=248, p=prime(n)=1571 and q=prime(p)=13217 have the same sum of digits=14;
n=660349, p=178115131 and q=178115131 have the same sum of digits=28.
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn,base
|
|
|
AUTHOR
|
|
|
|
STATUS
|
approved
|
| |
|
|
