|
|
A095012
|
|
Number of 8k+7 primes (A007522) in range ]2^n,2^(n+1)].
|
|
4
|
|
|
0, 1, 0, 2, 1, 4, 6, 12, 17, 36, 62, 118, 222, 395, 773, 1412, 2699, 5100, 9690, 18384, 35074, 67076, 128446, 246483, 473737, 911126, 1757021, 3390639, 6551367, 12675525, 24545392, 47584301, 92330675, 179318608, 348546687, 678022783, 1319953810, 2571408262
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,4
|
|
LINKS
|
|
|
FORMULA
|
|
|
MATHEMATICA
|
Module[{nn = 21, s}, s = Select[8 Range[0, 2^nn] + 7, PrimeQ]; Table[Count[s, _?(2^n < # < 2^(n + 1) &)], {n, nn}]] (* Michael De Vlieger, Jul 23 2017 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|