A175429 Number of primes that are permutations of first n primes.

1, 1, 1, 8, 20, 112, 608, 4436, 34843, 0, 4785242

Offset

1,4

Links

Table of n, a(n) for n=1..11.

Zak Seidov, Primes from first 6 primes

Zak Seidov, Primes from first 7 primes

Zak Seidov, Primes from first 8 primes

Example

a(1)=1: 2; a(2)=1: 23; a(3)=1, 523;
a(4)=8: {2357,2753,3257,3527,5237,5273,7253,7523};
a(5)=20: {112573, 115237,...,735211, 751123}, see A177275;
a(6)=112: {11132357,11132753,...,75231113,75311213}, see links;
a(7)=608: {1113257317,1113321757,...,7523131711,7523171311}, see links;
a(8)= 4436: {111317193257,111317193527,...,753191321117,753217131911}, see links;
a(9)= 34843: {11131719223357,11131719235237,...,75323217191113,75323219131117}
a(10)=0 because sum of digits of first 10 primes (2+3+5+7+(1+1)+(1+3)+(1+7)+(1+9)+(2+3)+(2+9))=57 is multiple of 3.

Crossrefs

Cf. A177275.

Sequence in context: A215181 A014584 A074472 * A297639 A094253 A208084

Adjacent sequences: A175426 A175427 A175428 * A175430 A175431 A175432

Keyword

base,nonn

Author

Zak Seidov, May 10 2010

Status

approved