Difference 2*k - A003961(k) computed for k for which this difference divides difference (A003961(k)-sigma(k)), where A003961 is fully multiplicative with a(prime(i)) = prime(i+1).
A379216
Difference 2*k - A003961(k) computed for k for which this difference divides difference (A003961(k)-sigma(k)), where A003961 is fully multiplicative with a(prime(i)) = prime(i+1).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =-1a(4) =-3a(5) =3a(6) =-1a(7) =1a(8) =1a(9) =-43a(10) =1a(11) =5a(12) =19a(13) =-1a(14) =-7a(15) =-5a(16) =1a(17) =-2005a(18) =1a(19) =-1a(20) =149a(21) =-193a(22) =-1a(23) =-3a(24) =-79243a(25) =1243a(26) =1253a(27) =-7a(28) =51a(29) =581
External references
- oeis: A379216