A129813 Lesser of consecutive prime pairs whose last digits differ by 8.

29, 59, 149, 179, 199, 239, 269, 401, 419, 491, 509, 569, 599, 619, 659, 701, 761, 809, 911, 1019, 1049, 1129, 1229, 1289, 1319, 1381, 1459, 1499, 1571, 1619, 1709, 1789, 1889, 1949, 2069, 2099, 2129, 2161, 2309, 2339, 2399, 2531, 2549, 2579, 2729, 2741

Offset

2,1

Comments

Conjecture: The number of terms in this sequence is infinite.

Links

Table of n, a(n) for n=2..47.

Example

The last digits of the consecutive prime pair 29 and 31 differ by 8 so 29 is in the table.

Mathematica

Transpose[Select[Partition[Prime[Range[500]], 2, 1], Abs[Mod[First[#], 10]-Mod[Last[#], 10]]==8&]][[1]] (* Harvey P. Dale, Nov 06 2012 *)

Prog

(PARI) \d can be 2, 4, 6, 8 primediffd(n, d) = { forprime(x=3, n, y=abs((nextprime(x+1)%10-x%10)); if(y==d, print1(x", ") ) ) }

Crossrefs

Sequence in context: A073651 A042672 A042670 * A060229 A326897 A139507

Adjacent sequences: A129810 A129811 A129812 * A129814 A129815 A129816

Keyword

easy,nonn,base,less

Author

Cino Hilliard, May 19 2007

Status

approved