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.

Previous Showing 11-13 of 13 results.

A132909 Numbers formed by concatenating 9 consecutive prime numbers.

Original entry on oeis.org

23571113171923, 357111317192329, 5711131719232931, 71113171923293137, 111317192329313741, 131719232931374143, 171923293137414347, 192329313741434753, 232931374143475359, 293137414347535961
Offset: 1

Views

Author

Omar E. Pol, Sep 04 2007

Keywords

Crossrefs

Prime numbers: A000040. Cf. A007795, A045533, A059932, A091762.

Programs

  • Mathematica
    FromDigits[Flatten[IntegerDigits/@#]]&/@Partition[Prime[Range[ 20]], 9, 1] (* Harvey P. Dale, Jul 18 2011 *)

A132910 Numbers formed by concatenating 10 consecutive prime numbers.

Original entry on oeis.org

2357111317192329, 35711131719232931, 571113171923293137, 7111317192329313741, 11131719232931374143, 13171923293137414347, 17192329313741434753, 19232931374143475359, 23293137414347535961
Offset: 1

Views

Author

Omar E. Pol, Sep 04 2007

Keywords

Crossrefs

Prime numbers: A000040. Cf. A007795, A045533, A059932, A091762.

A152521 Juxtaposition of prime(2n-1) and prime(2n) is a prime.

Original entry on oeis.org

23, 3137, 8389, 157163, 167173, 233239, 257263, 331337, 353359, 467479, 509521, 523541, 653659, 661673, 677683, 727733, 11871193, 12011213, 12591277, 13671373, 14531459, 16691693, 17091721, 17411747, 21792203, 22072213, 22812287
Offset: 1

Views

Author

Herman Jamke (hermanjamke(AT)fastmail.fm), Dec 06 2008

Keywords

Comments

Primes in sequence A007795.

Crossrefs

Cf. A007795.

Programs

  • PARI
    forstep(n=1,1000,2,a=eval(Str(prime(n),prime(n+1)));if(isprime(a),print1(a", ")))
Previous Showing 11-13 of 13 results.