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

Author

Vincenzo Librandi, Apr 15 2025

Keywords

• nonn
• base

Comments

Primes in A379208.

Examples

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

Links

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

Crossrefs

Cf. A140353, A228157, A379208.

Programs

Magma

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

Mathematica

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