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.

Showing 1-2 of 2 results.

A115104 Numbers n such that 4*n^3 + 1 is prime.

Original entry on oeis.org

1, 3, 4, 7, 9, 10, 19, 25, 34, 37, 39, 42, 49, 54, 55, 72, 73, 78, 85, 87, 93, 94, 102, 108, 109, 118, 138, 142, 147, 157, 160, 165, 168, 175, 192, 195, 202, 210, 214, 220, 228, 232, 243, 247, 249, 250, 252, 253, 258, 267, 273, 274, 279, 289, 297
Offset: 1

Views

Author

Parthasarathy Nambi, Mar 02 2006

Keywords

Comments

For any n in this sequence, 3*(4*n^3 + 1) has the same nonzero digits as its prime factors in base 2n. - Ely Golden, Dec 12 2016

Examples

			If n=94 then (4*n^3 + 1) = 3322337 (prime).
		

Crossrefs

Cf. A001912. See A199307 for the actual primes.

Programs

Extensions

More terms from Stefan Steinerberger, Mar 04 2006

A199364 Numbers k such that 4k^3 + 3 is prime.

Original entry on oeis.org

0, 1, 5, 10, 14, 20, 28, 34, 38, 49, 55, 59, 61, 80, 98, 103, 118, 133, 145, 146, 154, 160, 185, 196, 206, 224, 229, 241, 245, 250, 251, 320, 325, 334, 376, 383, 385, 388, 398, 416, 418, 440, 451, 454, 475, 476, 481, 488, 490, 493, 496, 500
Offset: 1

Views

Author

N. J. A. Sloane, Nov 05 2011

Keywords

Comments

See comment in A199307.

Crossrefs

Programs

Extensions

First term added by Vincenzo Librandi, Nov 08 2011
Showing 1-2 of 2 results.