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A075369 Square associated with twin primes (p,p+2): p(p+2) +1. Square of the average of twin primes. 4
16, 36, 144, 324, 900, 1764, 3600, 5184, 10404, 11664, 19044, 22500, 32400, 36864, 39204, 51984, 57600, 72900, 79524, 97344, 121104, 176400, 186624, 213444, 272484, 324900, 360000, 381924, 412164, 435600, 656100, 675684, 685584, 736164 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

MATHEMATICA

f[n_]:=Prime[n]*Prime[n+1]+1; lst={}; Do[If[IntegerQ[Sqrt[f[n]]], AppendTo[lst, f[n]]], {n, 4*5!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Feb 10 2010]

CROSSREFS

A037074(n) + 1.

Sequence in context: A074985 A069262 A076956 * A053893 A068833 A116190

Adjacent sequences:  A075366 A075367 A075368 * A075370 A075371 A075372

KEYWORD

nonn

AUTHOR

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 20 2002

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Last modified February 14 00:21 EST 2012. Contains 205567 sequences.