A133490 Smallest number at distance 2n from nearest prime (variant 3).

2, 0, 23, 53, 211, 211, 211, 1341, 1343, 2179, 3967, 15705, 16033, 19635, 24281, 24281, 31429, 31431, 31433, 38501, 38501, 58831, 203713, 206699, 206699, 370311, 370313, 370315, 370317, 1272749, 1272749, 1272749, 1357265, 1357267, 2010801

Offset

0,1

Comments

Let f(m) be the distance to the nearest prime as defined in A051700(m). Then a(n) = min { m: f(m)>= 2n}. The variants of a different definition of "distance" or demanding equality, f(m)=2n, are in A132860 and A051728.

Links

Table of n, a(n) for n=0..34.

Crossrefs

Sequence in context: A009378 A106708 A138551 * A051728 A201954 A005359

Adjacent sequences: A133487 A133488 A133489 * A133491 A133492 A133493

Keyword

nonn

Author

R. J. Mathar, Nov 30 2007

Status

approved