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A165934 Primes from twin primes by taking the factorial of each digit and adding them up. 0
11, 80651, 67, 251, 368881, 80651, 23, 1451, 251, 23, 10093, 61, 362927, 363269, 10093, 372973, 263, 10111, 59, 362941, 107, 363773, 10139, 107, 364513, 10139, 725827, 263, 365173, 364513, 12967, 737287, 10093, 10111, 374041, 776401, 162727, 725827, 725827, 368647, 10093, 263, 363269, 257, 363157, 80657, 443543, 73, 444971, 727211, 735853, 735853, 19, 29, 109, 363271, 20173, 17, 257, 10099 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..60.

Dario Alpern, Factorization using the Elliptic Curve Method

Chris Caldwell, The First 100,000 Twin Primes

EXAMPLE

11 from 101 and 103: 1! + 0! + 1! + 1! + 0! + 3! = 11; Similarly 80651 from 281 and 283; 368881 from 569 and 571.

MATHEMATICA

Select[Total[Flatten[IntegerDigits/@#]!]&/@Select[Partition[ Prime[ Range[2500]], 2, 1], Last[#]-First[#]==2&], PrimeQ] (* Harvey P. Dale, Jun 21 2011 *)

CROSSREFS

Cf. A001359

Sequence in context: A295176 A102367 A055322 * A110780 A087395 A199169

Adjacent sequences:  A165931 A165932 A165933 * A165935 A165936 A165937

KEYWORD

base,nonn

AUTHOR

Parthasarathy Nambi, Oct 01 2009

EXTENSIONS

More terms from Harvey P. Dale, Jun 21 2011

STATUS

approved

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Last modified December 5 22:37 EST 2019. Contains 329782 sequences. (Running on oeis4.)