|
Search: id:A095390
|
|
|
| A095390 |
|
a[n]=Min{x;A095389[x]=n}, n<=15; n-th term is the least subscript at which n arises in A095389. |
|
+0
2
|
| |
|
|
OFFSET
|
0,1
|
|
|
COMMENT
|
It is believed (or proved) that values at n>8 indices do not occur, except once, at the beginning when 13 lesser twins in 210.0+R range, where R is the reduced residues modulo 210: a[13]=0 because A095389[0]=13.
|
|
EXAMPLE
|
n=1:a[1]=28 means that in reduced residue system 210.28+R exactly 1 lesser-twin-prime arise; see A095389.
n=8: a[8]=968 means that at surprizingly high density of twin primes [8 cases] occur in range of {210.968+r, 210.968+r+2}, as follows: {203309, 203321, 203339, 203351, 203381, 203417, 203429, 203459}.
|
|
MATHEMATICA
|
{k=0, ta=Table[0, {100000}]}; Do[{m=0}; Do[s=210k+r; s1=210k+r+2; If[PrimeQ[s]&&PrimeQ[s+2], m=m+1], {r, 1, 210}]; ta[[k]]=m, {k, 1, 100000}]; Table[Min[Flatten[Position[ta, j]]], {j, 0, 15}]
|
|
CROSSREFS
|
Cf. A095389, A078859.
Sequence in context: A123964 A065790 A066539 this_sequence A033384 A073327 A123994
Adjacent sequences: A095387 A095388 A095389 this_sequence A095391 A095392 A095393
|
|
KEYWORD
|
fini,nonn
|
|
AUTHOR
|
Labos E. (labos(AT)ana.sote.hu), Jun 16 2004
|
|
|
Search completed in 0.002 seconds
|
