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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A230481 a(n) = prime(prime(2*n)) - prime(2*prime(n)).

Original entry on oeis.org

-2, 4, 12, 24, 30, 56, 52, 78, 84, 82, 108, 88, 126, 144, 126, 162, 150, 204, 210, 210, 248, 242, 234, 348, 266, 268, 320, 362, 380, 394, 304, 396, 340, 480, 378, 420, 466, 486, 476, 464, 498, 578, 476, 566, 592, 678, 600, 456, 524, 660, 714, 742, 768, 756
Offset: 1

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Author

M. F. Hasler, Oct 20 2013

Keywords

Comments

As difference of two odd primes, all terms are even.

Links

Crossrefs

Cf. A066066, A000040, A006450, A031215, A217622, A230460.

Programs

  • PARI
    a=n->prime(prime(2*n))-prime(2*prime(n))

Formula

a(n) = A217622(n) - A230460(n) = 2*A230482(n).
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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