A086649 -id:A086649

Search: a086649 -id:a086649

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A086704

Greater of the twin primes raised to their lesser twins.

+10
2

125, 16807, 1792160394037, 5480386857784802185939, 17761887753093897979823770061456102763834271, 9380082945933081406113456619151991432292083579779389915131296484043

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..6.

FORMULA

a(n) = A006512(n)^A001359(n)

EXAMPLE

a(4)=19^17=5480386857784802185939 because 17 and 19 are the 4th twin prime pair.

MATHEMATICA

Last[#]^First[#]&/@Select[Partition[Prime[Range[20]], 2, 1], Last[#]- First[#] == 2&] (* Harvey P. Dale, Jun 24 2013 *)

CROSSREFS

Cf. A006512, A001359, A086649.

KEYWORD

easy,nonn

AUTHOR

Christopher M. Tomaszewski (cmt1288(AT)comcast.net), Jul 28 2003

EXTENSIONS

More terms from Ray Chandler, Aug 07 2003

STATUS

approved

A104208

Numbers of digits in p1^p2 where p2 > p1 and (p1, p2) are twin primes.

+10
0

3, 5, 14, 24, 46, 70, 109, 136, 207, 222, 298, 329, 408, 441, 457, 540, 574, 659, 693, 781, 887, 1104, 1141, 1234, 1421, 1574, 1670, 1728, 1805, 1864, 2359, 2399, 2419, 2520, 2601, 3072, 3113, 3175, 3217, 3321

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..40.

Chris Caldwell, The First 1,008 Twin Primes.

EXAMPLE

243 = 3^5 and the number of digits is three, so the first term is 3.

CROSSREFS

Cf. A086649.

KEYWORD

nonn,base

AUTHOR

Parthasarathy Nambi, Apr 01 2005

STATUS

approved

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