|
|
A179437
|
|
a(n) = |2n - prime(n)|.
|
|
3
|
|
|
0, 1, 1, 1, 1, 1, 3, 3, 5, 9, 9, 13, 15, 15, 17, 21, 25, 25, 29, 31, 31, 35, 37, 41, 47, 49, 49, 51, 51, 53, 65, 67, 71, 71, 79, 79, 83, 87, 89, 93, 97, 97, 105, 105, 107, 107, 117, 127, 129, 129, 131, 135, 135, 143, 147, 151, 155, 155, 159, 161, 161, 169, 181, 183, 183, 185, 197
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,7
|
|
LINKS
|
|
|
FORMULA
|
a(n) = prime(n) - 2*n for n != 2, 3, 4; a(n) = 1 otherwise. - Jianing Song, Jan 15 2023
|
|
MATHEMATICA
|
|
|
PROG
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|