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 A364555 #17 Sep 01 2023 21:14:06
%S A364555 17,28,32,43,46,62,67,71,72,80,88,94,101,103,104,108,109,110,118,122,
%T A364555 124,127,130,137,144,148,149,151,152,161,162,163,170,171,172,178,181,
%U A364555 185,188,196,197,202,206,208,212,214,218,223,226,236,238,241,242,256,257,258
%N A364555 Numbers m such that no triangular number is m times a prime.
%C A364555 Numbers m such that A364554(m) = 0.
%C A364555 Primes in sequence are A109998.
%C A364555 Conjecture: Numbers m such that there is no prime number in the union of all sets {(2*r -+ 1)/d; (r -+ 1)/(2*d)}, where d is some divisor of m and r = m/d.
%e A364555 17 is a term since there isn't any triangular number T(k) such that T(k) = 17*p, with p prime.
%e A364555 28 is a term since there isn't any triangular number T(k) such that T(k) = 28*p, with p prime.
%Y A364555 Cf. A000217, A109998, A364554.
%K A364555 nonn
%O A364555 1,1
%A A364555 _Lamine Ngom_, Jul 28 2023