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A053736 Run through primes p; if the digits of p*q (where q is the prime following p) can be rearranged to form one or more primes r, append these primes r to the sequence. 2
53, 431, 233, 347, 743, 1471, 1741, 7411, 1571, 5171, 5711, 7151, 1367, 1637, 3167, 3617, 3671, 3761, 6173, 6317, 1249, 1429, 4129, 4219, 9241, 9421, 1237, 1327, 1723, 2137, 2371, 2713, 2731, 3217, 3271, 7213, 7321, 5399, 5939, 9539 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Leading zeros are not allowed in the rearranged number.
REFERENCES
C. A. Pickover, "Vampire numbers," chapter 30 of Keys to Infinity. NY: Wiley, 1995. Pages 227-231
LINKS
EXAMPLE
7*11=77, but no prime rearrangements are possible; 11*13 is 143, whose digits can be rearranged to 431, a prime.
CROSSREFS
A053652 gives the entries sorted and with duplicates removed. Cf. A014575, A053652.
Sequence in context: A074836 A142851 A185239 * A181968 A261537 A142209
KEYWORD
easy,nonn,base
AUTHOR
Enoch Haga, Feb 13 2000
EXTENSIONS
Corrected and extended by Jens Kruse Andersen, Dec 01 2006
STATUS
approved

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Last modified March 19 01:57 EDT 2024. Contains 370952 sequences. (Running on oeis4.)