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A344021
Numbers k such that A061762(k) and k+A061762(k) are both prime.
1
1, 12, 16, 32, 34, 54, 56, 78, 104, 106, 160, 232, 236, 250, 252, 298, 302, 304, 326, 328, 340, 362, 382, 388, 474, 490, 502, 508, 526, 560, 580, 610, 650, 656, 670, 676, 706, 740, 760, 838, 850, 890, 898, 928, 940, 980, 1004, 1006, 1024, 1028, 1042, 1048, 1082, 1084, 1152, 1190, 1192, 1246, 1248
OFFSET
1,2
LINKS
EXAMPLE
a(3) = 16 is a term because A061762(16) = 1*6+1+6=13 is prime and 16+13=29 is prime.
MAPLE
f:= proc(n) local L;
L:= convert(n, base, 10);
convert(L, `*`)+convert(L, `+`);
end proc:
filter:= proc(n) local t; t:= f(n); isprime(t) and isprime(n+t) end proc:
select(filter, [1, seq(i, i=2..10000, 2)]);
CROSSREFS
Sequence in context: A357631 A109240 A020740 * A086980 A256934 A343153
KEYWORD
nonn,base
AUTHOR
J. M. Bergot and Robert Israel, May 06 2021
STATUS
approved