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 A354880 #24 Aug 24 2022 09:57:07 %S A354880 17,19,21,51,52,55,56,57,58,59,60,61,88,89,90,91,92,93,94,95,96,97,98, %T A354880 99,101,102,103,104,105,107,108,109,110,111,112,113,114,115,116,117, %U A354880 118,119,120,121,127,158,159,160,161,162,163,164,165,166,167,168,169 %N A354880 Numbers k where A133411(k) is not equal to A328521(k-1). %e A354880 A133411(17)=5587021440. (5587021440/19 = A133411(16) = 294053760.) But A328521(16)=2205403200. (2205403200 has 16 prime factors and is A328521(16) even if not 294053760 times an integer [the quotient is 15/2].) Thus, 17 is a term of this sequence. %Y A354880 Cf. A133411, A328521. %K A354880 nonn %O A354880 1,1 %A A354880 _J. Lowell_, Jun 09 2022