A158342 List of twin primes p1 and p2 with odd sum of digits of p1 and even sum of digits of p2.

29, 31, 179, 181, 269, 271, 809, 811, 1019, 1021, 1619, 1621, 1949, 1951, 2339, 2341, 2999, 3001, 3329, 3331, 3389, 3391, 3929, 3931, 4049, 4051, 4229, 4231, 4649, 4651, 5279, 5281, 5639, 5641, 5879, 5881, 6089, 6091, 6269, 6271, 6359, 6361, 6449, 6451

Offset

1,1

Links

Harvey P. Dale, Table of n, a(n) for n = 1..3000

Mathematica

Select[Partition[Prime[Range[1000]], 2, 1], #[[2]]-#[[1]]==2&&OddQ[Total[IntegerDigits[#[[1]]]]]&&EvenQ[Total[IntegerDigits[#[[2]]]]]&]//Flatten (* Harvey P. Dale, Jan 19 2025 *)

Crossrefs

Cf. A077800.

Sequence in context: A156976 A157681 A288615 * A077286 A235364 A178425

Adjacent sequences: A158339 A158340 A158341 * A158343 A158344 A158345

Keyword

nonn,base,less

Author

Juri-Stepan Gerasimov, Mar 16 2009

Extensions

Corrected (269,271 inserted, 1229,1231 removed, 3119,3121 removed...) by R. J. Mathar, May 19 2010

Status

approved