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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A086801 a(n) = prime(n) - 3.

Original entry on oeis.org

-1, 0, 2, 4, 8, 10, 14, 16, 20, 26, 28, 34, 38, 40, 44, 50, 56, 58, 64, 68, 70, 76, 80, 86, 94, 98, 100, 104, 106, 110, 124, 128, 134, 136, 146, 148, 154, 160, 164, 170, 176, 178, 188, 190, 194, 196, 208, 220, 224, 226, 230, 236, 238, 248, 254, 260, 266, 268, 274, 278
Offset: 1

Views

Author

Giovanni Teofilatto, Aug 05 2003

Keywords

Comments

Numbers n such that n+3 is a prime.

Examples

			n=16 is here because 16+3=19 is a prime.
		

References

  • M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988
  • Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta, UTET, CittaStudiEdizioni, Milano 1997

Crossrefs

Programs

Formula

a(n) = 2*A067076(n) = 2*(A006254(n+1)-2).

Extensions

Extended by Ray Chandler, Nov 29 2003

A091734 Permutation of primes generated by array shown below.

Original entry on oeis.org

2, 3, 11, 17, 7, 5, 31, 19, 13, 41, 29, 23, 59, 43, 37, 67, 53, 47, 83, 71, 61, 97, 79, 73, 109, 101, 89, 127, 107, 103, 149, 131, 113, 157, 139, 137, 179, 163, 151, 191, 173, 167
Offset: 1

Views

Author

Giovanni Teofilatto, Mar 06 2004

Keywords

Comments

2 11 17 31 41 59 67 83 97... (A091735)
3 7 19 29 43 53 71 79 101... (A091738)
5 13 23 37 47 61 73 89 103...(A031336)

Extensions

A-number corrected by R. J. Mathar, Apr 22 2010
Showing 1-2 of 2 results.