A166480 Greater of twin primes, written in base 6.

5, 11, 21, 31, 51, 111, 141, 201, 251, 301, 351, 411, 501, 521, 531, 1021, 1041, 1131, 1151, 1241, 1341, 1541, 2001, 2051, 2231, 2351, 2441, 2511, 2551, 3021, 3431, 3451, 3501, 3551, 4031, 4421, 4441, 4511, 4531, 5021, 5201, 5411, 5531, 5551, 10011

Offset

1,1

Comments

All but the first value are of the form 6n+1; hence in base 6 end each ends with the digit 1.

Links

Table of n, a(n) for n=1..45.

Formula

a(n) = A007092(A006512(n)) = A007092(A166479(n)+2).

Mathematica

FromDigits[IntegerDigits[#, 6]]&/@Select[Partition[Prime[Range[300]], 2, 1], #[[2]]-#[[1]] == 2&][[All, 2]] (* Harvey P. Dale, Jun 02 2022 *)

Crossrefs

Cf. A006512, A007092, A166479.

Sequence in context: A139534 A245773 A372906 * A164096 A298785 A163787

Adjacent sequences: A166477 A166478 A166479 * A166481 A166482 A166483

Keyword

base,easy,nonn

Author

Jonathan Vos Post, Oct 14 2009

Extensions

Extended by R. J. Mathar, Oct 16 2009

Comment amended by Harvey P. Dale, Jun 02 2022

Status

approved