A340736 Prime values in A067439, in the order in which they appear.

5, 19, 83, 89, 151, 167, 107, 71, 233, 163, 173, 359, 523, 317, 751, 569, 613, 587, 941, 823, 2293, 1741, 1873, 3541, 3907, 2179, 7817, 3907, 2683, 3433, 6277, 6577, 4787, 8807, 9661, 20051, 9403, 10267, 23909, 16927, 8779, 14437, 14887, 31231, 18191, 13883, 14281, 37987, 38839, 14629, 22159

Offset

1,1

Comments

3907 occurs twice, as a(25) and a(28). Are there any others?

Links

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

Formula

a(n) = A067439(A340731(n)).

Example

a(3) = 83 because 83 = A067439(25) is the third prime value to occur in A067439.

Maple

f:= proc(n) local t, k;
   t:= add(`if`(igcd(n, k)=1, n mod k, 0), k=2..n-1);
   if isprime(t) then t fi
end proc:
map(f, [$1..1000]);

Crossrefs

Cf. A067439, A340731.

Sequence in context: A149786 A149787 A323267 * A094726 A149788 A149789

Adjacent sequences: A340733 A340734 A340735 * A340737 A340738 A340739

Keyword

nonn

Author

J. M. Bergot and Robert Israel, Jan 18 2021

Status

approved