A007794 Juxtapose pairs of primes (starting at 1).

12, 35, 711, 1317, 1923, 2931, 3741, 4347, 5359, 6167, 7173, 7983, 8997, 101103, 107109, 113127, 131137, 139149, 151157, 163167, 173179, 181191, 193197, 199211, 223227, 229233

Offset

1,1

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Maple

L:= [1, seq(ithprime(i), i=1..99)]:
seq(L[2*k-1]*10^(1+ilog10(L[2*k]))+L[2*k], k=1..50); # Robert Israel, Jun 28 2018

Mathematica

#[[1]]*10^IntegerLength[#[[2]]]+#[[2]]&/@Partition[Join[{1}, Prime[ Range[ 51]]], 2] (* Harvey P. Dale, Jul 12 2019 *)

Crossrefs

Sequence in context: A103472 A009649 A195539 * A008653 A038006 A205967

Adjacent sequences: A007791 A007792 A007793 * A007795 A007796 A007797

Keyword

nonn,base

Author

bmoore(AT)artemis.ess.ucla.edu (William B. Moore)

Status

approved