A362152 Numbers k such that k and k^2+1 have equal sums of distinct prime divisors.

7, 1384230, 1437236, 1770802, 2090663, 4406787, 8493543, 8691863, 11576449, 16147463, 18216983, 22128632, 25156787, 32929141, 43106430, 43768187, 47500230, 50085263, 50497485, 59461592, 66419007, 66507421, 71182692, 95268412, 99848687, 164163693

Offset: 1

Author

Max Alekseyev, Apr 18 2023

Keywords

• nonn

Comments

Numbers k such that A008472(k) = A008472(k^2+1).

Crossrefs

Cf. A008472, A006145.

Programs

PARI

is_A362152(n) = vecsum(factor(n)[,1])==vecsum(factor(n^2+1)[,1]);