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A069486 a(n) = 2*prime(n)*prime(n+1). 4
12, 30, 70, 154, 286, 442, 646, 874, 1334, 1798, 2294, 3034, 3526, 4042, 4982, 6254, 7198, 8174, 9514, 10366, 11534, 13114, 14774, 17266, 19594, 20806, 22042, 23326, 24634, 28702, 33274, 35894, 38086, 41422, 44998 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
a(n) = 2*A006094(n);
together with A069482(n) and A069484(n) a Pythagorean triangle is formed with area = A069487(n).
LINKS
Table of n, a(n) for n=1..35.
MATHEMATICA
2Times@@#&/@Partition[Prime[Range[40]], 2, 1] (* Harvey P. Dale, Dec 17 2012 *)
CROSSREFS
Cf. A006094, A069482, A069484, A069487.
Sequence in context: A322181 A334791 A110019 * A211117 A301775 A175157
Adjacent sequences: A069483 A069484 A069485 * A069487 A069488 A069489
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Mar 29 2002
STATUS
approved

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Last modified August 18 11:30 EDT 2024. Contains 375266 sequences. (Running on oeis4.)