This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A335557 #8 Aug 01 2020 15:36:28 %S A335557 20,70,104,464,650,836,945,1575,1952,2002,2205,3230,4030,5830,7192, %T A335557 7232,7425,7912,8415,8925,9555,11096,11132,11492,12705,15028,17816, %U A335557 20482,32128,32445,33345,35650,40850,45356,45885,46035,47804,49875,51765,51850,55796,57584,61904 %N A335557 Primitive abundant numbers version 2 (abundant numbers all of whose proper divisors are deficient numbers) and increasing any prime factor in the prime factorization gives a non-abundant number when factored back. %e A335557 104 is in the sequence as none of its divisors is abundant and its prime factorization, 2^3 * 13 has the property that when any prime factor is increased to the next prime factor, we get 3^3 * 13 = 351 which isn't abundant (it's then deficient as it's not perfect) or we get 2^3*17 = 136 which is deficient. %t A335557 primabQ[n_] := DivisorSigma[1, n] > 2n && AllTrue[Most @ Divisors[n], DivisorSigma[1, #] < 2# &]; seqQ[n_] := Module[{f = FactorInteger[n]}, p = f[[;; , 1]]; e = f[[;; , 2]]; q = NextPrime[p]; AllTrue[n*(q/p)^e, DivisorSigma[1, #] <= 2# &]]; Select[Range[10^5], primabQ[#] && seqQ[#] &] (* _Amiram Eldar_, Jul 05 2020 *) %Y A335557 Cf. A071395. %K A335557 nonn %O A335557 1,1 %A A335557 _David A. Corneth_, Jun 14 2020