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A080701 Product of upper bound twin-prime-indexed primes and their upper bound twin prime. 0
55, 119, 533, 1273, 3937, 8213, 17263, 26791, 57989, 65291, 110783, 132427, 196747, 226003, 242183, 331363, 367043, 471811, 522701, 651353, 820499, 1224689, 1307227, 1527437, 1967003, 2371363, 2657021, 2826973, 3078041, 3267323 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..30.

FORMULA

Let prime(i) = i-th prime, let twin(n) = (P, Q) be n-th pair of twin primes; sequence gives prime(Q)*Q.

EXAMPLE

The 3rd pair of twin primes is twin(3) = (11,13), prime(13) = 41, a(3) = 41*13 = 533.

MATHEMATICA

#*Prime[#]&/@(Transpose[Select[Partition[Prime[Range[200]], 2, 1], Last[#]- First[#] ==2&]][[2]]) (* Harvey P. Dale, Jun 04 2014 *)

CROSSREFS

Cf. A057470, A057473.

Sequence in context: A044242 A044623 A063345 * A208294 A039442 A063324

Adjacent sequences:  A080698 A080699 A080700 * A080702 A080703 A080704

KEYWORD

easy,nonn

AUTHOR

Cino Hilliard, Mar 04 2003

STATUS

approved

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Last modified June 16 15:56 EDT 2021. Contains 345063 sequences. (Running on oeis4.)