|
| |
|
|
A088755
|
|
Number of n-digit primes beginning with n.
|
|
5
|
|
|
|
0, 2, 16, 119, 924, 7445, 63129, 547572, 4838319, 4814936, 43167234, 391378851, 3580266494, 32997926272, 306051434210, 2853931339135, 26737370196938, 251515351394258, 2374493400086829, 22488661383368556, 213597279448646179, 2033961812788210675, 19413250431142245897
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,2
|
|
|
COMMENTS
|
This is a subsidiary sequence suggested in A088104.
|
|
|
LINKS
|
Table of n, a(n) for n=1..23.
Tomás Oliveira e Silva, Tables of values of pi(x) and of pi2(x)
|
|
|
EXAMPLE
|
a(2) = 2 since 23 and 29 are the only two 2-digit primes beginning with 2.
|
|
|
CROSSREFS
|
Cf. A077504, A077505, A088104, A088105, A088754.
Sequence in context: A288964 A193289 A159324 * A136782 A112710 A046105
Adjacent sequences: A088752 A088753 A088754 * A088756 A088757 A088758
|
|
|
KEYWORD
|
nonn,base
|
|
|
AUTHOR
|
Ray Chandler, Oct 15 2003
|
|
|
EXTENSIONS
|
More terms from Harvey P. Dale, Oct 16 2003
a(10)-a(13) corrected and a(14)-a(22) from Donovan Johnson, Apr 24 2013
Incorrect Mathematica program deleted by Harvey P. Dale, Apr 25 2013
a(23) from Chai Wah Wu, Jun 20 2019
|
|
|
STATUS
|
approved
|
| |
|
|
