A107636 - OEIS

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A107636

Lesser prime in pair prime(k) +/- k for some k.

3, 7, 43, 139, 251, 683, 1549, 2273, 2393, 2731, 3217, 3529, 3943, 4339, 4723, 4799, 4909, 5531, 5801, 7907, 9421, 10009, 11549, 12263, 12791, 13441, 14011, 14683, 15559, 18089, 19087, 20921, 22271, 22391, 23279, 24001, 24107, 24767, 24809, 26681, 26861, 27793

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..42.

FORMULA

a(n) = prime(A064403(n)) - A064403(n).

EXAMPLE

a(1) = 3 because A064403(1) = 4 and prime(4) - 4 = 7 - 4 = 3.

MATHEMATICA

R=3000; L=Select[Range[R], AllTrue[Prime[#]+{#, -#}, PrimeQ]&]; Prime/@L-L (* James C. McMahon, Feb 18 2024 *)

CROSSREFS

Cf. A064403 (values of k), A107637, A143794 (prime(k)).

Sequence in context: A282178 A101208 A050633 * A303160 A258435 A074268

Adjacent sequences: A107633 A107634 A107635 * A107637 A107638 A107639

KEYWORD

nonn

AUTHOR

Zak Seidov, May 19 2005

STATUS

approved