A382118 Prime indices k such that prime(k) and prime(k) + 9 are anagrams.

19, 73, 79, 163, 197, 241, 269, 281, 431, 439, 619, 647, 691, 739, 751, 761, 823, 877, 953, 1019, 1051, 1109, 1223, 1259, 1291, 1307, 1423, 1471, 1723, 1741, 1747, 1847, 1949, 1979, 2213, 2371, 2473, 2503, 2647, 2789, 2803, 2819, 2879, 2903, 2909, 3019, 3163, 3361

Offset

1,1

Comments

Primes in A379208.

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..19861

Example

The prime 19 is a term of the sequence because prime(19)= 67 and 67 + 9 = 76 are anagrams.

Mathematica

Select[Prime[Range[500]], Sort[IntegerDigits[Prime[#]]]==Sort[IntegerDigits[Prime[#]+9]]&]

Prog

(Magma) [n: n in [0..10000] | IsPrime(n) and Sort(Intseq(NthPrime(n))) eq Sort(Intseq(NthPrime(n) + 9))];

Crossrefs

Cf. A140353, A228157, A379208.

Sequence in context: A142516 A127874 A289817 * A321343 A255889 A154406

Adjacent sequences: A382115 A382116 A382117 * A382119 A382120 A382121

Keyword

nonn,base

Author

Vincenzo Librandi, Apr 15 2025

Status

approved