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A053653 Number of ways to rearrange digits of prime(n)*prime(n+1) to form a prime. 1
0, 0, 1, 0, 1, 0, 1, 2, 0, 0, 3, 4, 8, 0, 6, 11, 3, 0, 3, 6, 1, 1, 4, 3, 0, 2, 5, 6, 15, 15, 17, 16, 12, 12, 4, 10, 8, 5, 8, 18, 11, 23, 5, 13, 9, 10, 8, 6, 27, 9, 4, 6, 14, 4, 24, 3, 14, 6, 4, 33, 7, 14, 11, 12, 6, 86, 26, 53, 13, 79, 27 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,8

LINKS

Table of n, a(n) for n=1..71.

EXAMPLE

a(8)=2 because 19*23=437 and 2 primes, 347 and 743, can be formed from the digits of 437.

MAPLE

Leading zeros are not allowed in the rearranged number.

CROSSREFS

Cf. A053652, A053736.

Sequence in context: A013585 A261319 A230414 * A262174 A064146 A244120

Adjacent sequences:  A053650 A053651 A053652 * A053654 A053655 A053656

KEYWORD

easy,nonn,base

AUTHOR

Enoch Haga, Feb 18 2000

EXTENSIONS

Edited by Jens Kruse Andersen, Dec 01 2006

STATUS

approved

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Last modified November 18 12:16 EST 2019. Contains 329261 sequences. (Running on oeis4.)