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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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A372078 Primes p that are introduced in A373390 by 3*p.

Original entry on oeis.org

5, 13, 17, 29, 41, 43, 47, 59, 67, 97, 157
Offset: 1

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Author

N. J. A. Sloane, Jun 18 2024

Keywords

Comments

Conjecture: there are no other terms. (See the comments and conjectures in A373790.)
These are primes numbered 3, 6, 7, 10, 13, 14, 15, 17, 19, 25, 37.
They appear in A373390 at indices 9, 25, 35, 61, 85, 91, 99, 126, 139, 204, 335.
157 is the 37th prime. The conjecture is that for the 38th and all later primes p, in A373390 there are three successive terms 2*p, x, p. The values of x are given in A373790.

Examples

			The first (and only) multiple of 13 in A373390 that precedes A373390(25) = 13 is A373390(23) = 39 = 3*13, so 13 is a term.

Crossrefs

Cf. A373390, A372072, A372073, A372079-A372081, A373786-A373791.
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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