cp's OEIS Frontend

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.

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A364555 Numbers m such that no triangular number is m times a prime.

Original entry on oeis.org

17, 28, 32, 43, 46, 62, 67, 71, 72, 80, 88, 94, 101, 103, 104, 108, 109, 110, 118, 122, 124, 127, 130, 137, 144, 148, 149, 151, 152, 161, 162, 163, 170, 171, 172, 178, 181, 185, 188, 196, 197, 202, 206, 208, 212, 214, 218, 223, 226, 236, 238, 241, 242, 256, 257, 258
Offset: 1

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Author

Lamine Ngom, Jul 28 2023

Keywords

Comments

Numbers m such that A364554(m) = 0.
Primes in sequence are A109998.
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.

Examples

			17 is a term since there isn't any triangular number T(k) such that T(k) = 17*p, with p prime.
28 is a term since there isn't any triangular number T(k) such that T(k) = 28*p, with p prime.

Crossrefs

Cf. A000217, A109998, A364554.
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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