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A119752 a(1)=2; a(n)=first even number greater than a(n-1) such that a(i)+a(n)+1 is prime for all i=1,2,...,n. 9
2, 8, 14, 44, 224, 638, 1274, 4004, 675404, 2203958, 3075158, 6195234164, 77989711184, 4566262987328 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..14.

MATHEMATICA

Table[If[n == 1, a[1] = 2, j = a[n - 1] + 2; While[a[n] = j; !

    AllTrue[Table[a[i] + a[n] + 1, {i, 1, n}], PrimeQ], j += 2]; j]

, {n, 1, 9}] (* Robert Price, Apr 03 2019 *)

CROSSREFS

Cf. A119751

Sequence in context: A039660 A333053 A333054 * A111001 A055258 A277649

Adjacent sequences:  A119749 A119750 A119751 * A119753 A119754 A119755

KEYWORD

more,nonn

AUTHOR

Walter Kehowski, Jun 17 2006

EXTENSIONS

a(13),a(14) from Donovan Johnson, Mar 23 2008

STATUS

approved

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Last modified May 8 21:56 EDT 2021. Contains 343668 sequences. (Running on oeis4.)