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.

A098048 Numbers k such that A098037(k) sets a new record. A098037 is the number of prime divisors (counting multiplicity) of the sums of two consecutive primes.

Original entry on oeis.org

1, 2, 5, 16, 18, 43, 162, 190, 532, 564, 3314, 3908, 10499, 30789, 53828, 62946, 278737, 364195, 629686, 3768344, 7827416, 9496221, 23159959, 68035462, 92566977, 370110663, 648634305, 4032924162, 7748432257, 17324573653, 19879357650, 34988238805
Offset: 1

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Author

Jason Earls, Sep 11 2004

Keywords

Crossrefs

Programs

  • Mathematica
    s = PrimeOmega[Total[#]] & /@ Partition[Prime[Range[10^5]], 2, 1]; Map[FirstPosition[s, #][[1]] &, Union@FoldList[Max, s]] (* Amiram Eldar, Feb 07 2020 *)
    With[{nn=10^6},DeleteDuplicates[Thread[{Range[nn-1],PrimeOmega[Total[#]]&/@Partition[Prime[ Range[nn]],2,1]}],GreaterEqual[ #1[[2]],#2[[2]]]&][[;;,1]]] (* The program generates the first 19 terms of the sequence. *) (* Harvey P. Dale, Sep 20 2024 *)

Extensions

a(17)-a(29) from Donovan Johnson, Sep 27 2008
a(30)-a(32) from Amiram Eldar, Feb 07 2020