A325963 Numbers n for which A034448(n)-n is equal to n-A048250(n).

1, 4, 24, 240, 349440

Offset: 1

Author

Antti Karttunen, Jun 04 2019

Keywords

• nonn
• more

Comments

No other terms below 536870912 (2^29).

a(6) > 10^12, if it exists. - Giovanni Resta, Jun 07 2019

Crossrefs

Cf. A034448, A048250, A034460, A325313.

Positions of zeros in A325977.

Programs

PARI

A034448(n) = { my(f=factorint(n)); prod(k=1, #f~, 1+(f[k, 1]^f[k, 2])); };
A048250(n) = factorback(apply(p -> p+1,factor(n)[,1]));
isA325963(n) = ((A034448(n)-n) == (n-A048250(n)));