|
|
A226753
|
|
Numbers n such that sigma(n) + sigma(n+1) + sigma(n+2) = sigma(n+3) + sigma(n+4) + sigma(n+5).
|
|
0
|
|
|
52, 56, 2199, 17312, 92444, 31768040, 41159079, 52236776, 79563436, 683321810, 689969123, 757808252, 881421986, 910016369, 22184779055
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
The sequence of corresponding sums begins: 272, 290, 10820, 86514, 473568, 162349956, 203060920, 258797664, 398693936, 3418531584, 3544794576, 3812186016, 4066082208, 4374966816.
|
|
LINKS
|
|
|
EXAMPLE
|
Sigma(52) + sigma(53) + sigma(54) = 98 + 54 + 120 = 272.
Sigma(55) + sigma(56) + sigma(57) = 72 + 120 + 80 = 272.
So 52 is in the sequence.
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,more
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|