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A154506
Primes of the form concatenation(A141468(k), k).
0
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
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
KEYWORD
nonn,base
AUTHOR
EXTENSIONS
Edited and extended from a(13) onwards by N. J. A. Sloane, Jun 26 2009
STATUS
approved