A154506 Primes of the form concatenation(A141468(k), k).

43, 107, 149, 2719, 3323, 5641, 5843, 7253, 7757, 8059, 8563, 9067, 12697, 182141, 188147, 224177, 279221, 298237, 300239, 315251, 350281, 360289, 362291, 371299, 388313, 412333, 418339, 424343, 448363, 453367, 460373, 469379, 473383, 549449, 558457

Offset

1,1

Links

Table of n, a(n) for n=1..35.

Example

43 is a term since 43 is a prime and A141468(3)=4.
107 is a term since 107 is a prime and A141468(7)=10.

Maple

# read transforms; read b-file for A141468 (giving list b1); then:
t0:=[];
for n from 2 to nops(b1) do
t1:=cat(b1[n], n);
t2:=stoint(t1);
if isprime(t2) then t0:=[op(t0), t2]; fi;
od:
t0; # N. J. A. Sloane, Jun 27 2009

Crossrefs

Cf. A141468.

Sequence in context: A023293 A115606 A194773 * A044230 A044611 A246931

Adjacent sequences: A154503 A154504 A154505 * A154507 A154508 A154509

Keyword

nonn,base

Author

Juri-Stepan Gerasimov, Jan 11 2009

Extensions

Edited and extended from a(13) onwards by N. J. A. Sloane, Jun 26 2009

Status

approved