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A140121 Primes of the form prime(x)*prime(x+1) + (prime(x+1)-prime(x)). 0
7, 17, 37, 673, 1153, 4093, 7393, 8641, 22501, 32401, 57601, 64513, 70753, 72901, 126733, 136897, 176401, 190093, 205201, 256033, 313597, 324901, 329473, 348097, 430333, 497017, 541693, 585217, 715681, 891133, 974161, 988033, 1238761, 1267873, 1416097, 1432801, 1664101, 1674433, 1742401, 1932037, 2005021, 2146201, 2238013, 2265001, 2480617, 2637373 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
2*3+(3-2) = 2*3+1 = 7, 23*29+(29-23) = 23*29+6 = 673.
MATHEMATICA
a = {}; Do[p1 = Prime[n]; p2 = Prime[n + 1]; p = p1*p2 + (p2 - p1); p3 = p2 - p1; If[PrimeQ[p], AppendTo[a, p]], {n, 10^2}]; a
(* Alternate: *) Select[(#[[1]] #[[2]]+#[[2]]-#[[1]])&/@Partition[ Prime[Range[300]], 2, 1], PrimeQ] (* Harvey P. Dale, Dec 03 2010 *)
CROSSREFS
Sequence in context: A214634 A172156 A273947 * A102770 A253663 A298369
KEYWORD
nonn
AUTHOR
EXTENSIONS
Additional terms from Harvey P. Dale, Dec 03 2010
STATUS
approved

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Last modified March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)