19922943

Appears in sequences

• a(n) = (n-1)*2^n - 1.at n=19A163383
• a(n) = 19*2^n-1.at n=20A198276
• Numbers k such that the odd part of (1+k) divides (1 + odd part of A048250(k)), where A048250 is sum of the squarefree divisors of n.at n=43A387410
• Numbers k such that the odd part of (1+k) divides (1 + odd part of A001615(k)), where A001615 is Dedekind's psi-function.at n=42A387415
• Numbers k such that the odd part of (1+k) divides (1 + odd part of A034448(k)), where A034448 is unitary sigma (usigma).at n=42A387418
• Numbers k such that the odd part of (1+k) divides (1 + odd part of A003959(k)), where A003959 is multiplicative with a(p^e) = (p+1)^e.at n=44A387419