Deficiency of prime-shifted squares: a(n) = 2*A003961(n^2) - sigma(A003961(n^2)), where A003961 is fully multiplicative function with a(prime(i)) = prime(i+1).
A378231
Deficiency of prime-shifted squares: a(n) = 2*A003961(n^2) - sigma(A003961(n^2)), where A003961 is fully multiplicative function with a(prime(i)) = prime(i+1).
Terms
- a(0) =1a(1) =5a(2) =19a(3) =41a(4) =41a(5) =47a(6) =109a(7) =365a(8) =469a(9) =141a(10) =155a(11) =299a(12) =271a(13) =449a(14) =683a(15) =3281a(16) =341a(17) =1097a(18) =505a(19) =1041a(20) =1927a(21) =663a(22) =811a(23) =2567a(24) =2001a(25) =1211a(26) =11719a(27) =3509a(28) =929a(29) =-921
External references
- oeis: A378231