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 1-3 of 3 results.

A060194 Partial products of A060192.

Original entry on oeis.org

3, 15, 195, 3315, 96135, 2980185, 128147955, 6022953885, 367400186985, 24615812527995, 1944649189711605, 161405882746063215, 16301994157352384715, 1679105398207295625645, 189738909997424405697885, 24096841569672899523631395
Offset: 0

Views

Author

N. J. A. Sloane, Mar 21 2001

Keywords

Extensions

Name corrected by Sean A. Irvine, Oct 30 2022

A060191 Union_i p(4i), p(4i+1), where p(k) = k-th prime.

Original entry on oeis.org

2, 7, 11, 19, 23, 37, 41, 53, 59, 71, 73, 89, 97, 107, 109, 131, 137, 151, 157, 173, 179, 193, 197, 223, 227, 239, 241, 263, 269, 281, 283, 311, 313, 337, 347, 359, 367, 383, 389, 409, 419, 433, 439, 457, 461, 479, 487, 503, 509, 541, 547, 569
Offset: 0

Views

Author

N. J. A. Sloane, Mar 21 2001

Keywords

Crossrefs

Programs

  • Mathematica
    Drop[Drop[Prime[Range[110]],{2,-1,4}],{2,-1,3}] (* Harvey P. Dale, Nov 26 2011 *)
    Prime[#]&/@LinearRecurrence[{1,1,-1},{1,4,5,8},60] (* Harvey P. Dale, Apr 02 2018 *)

A091578 Permutation of primes generated by 2-rowed array shown below.

Original entry on oeis.org

2, 7, 3, 11, 5, 19, 13, 23, 17, 37, 29, 41, 31, 53, 43, 59, 47, 71, 61, 73, 67, 89, 79, 97, 83, 107, 101, 109, 103, 131, 113, 137, 127, 151, 139, 157, 149, 173, 163, 179, 167, 193, 181, 197, 191, 223, 199, 227, 211, 239, 229, 241, 233, 263, 251, 257
Offset: 1

Views

Author

Giovanni Teofilatto, Mar 05 2004; corrected and extended Oct 13 2006, Oct 15 2006

Keywords

Comments

2 7 11 19 23 37 41 53 59 ... (A060191)
3 5 13 17 29 31 43 47 61 ... (A060192)

Crossrefs

Cf. A090964.

Formula

a(n) = A000040(A090964(n)). a(n) = A000040(a(k+8) = a(k)+8).
Showing 1-3 of 3 results.