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 1-4 of 4 results.

A175611 Primes p such that A175599(p)=0.

Original entry on oeis.org

2, 3, 5, 7, 31, 127, 8191, 131071, 524287, 2147483647, 2305843009213693951, 618970019642690137449562111, 162259276829213363391578010288127, 170141183460469231731687303715884105727
Offset: 1

Views

Author

Juri-Stepan Gerasimov, Jul 24 2010

Keywords

Comments

Primes p such that A043276(p)=A175597(p).

Links

Crossrefs

Cf. A000668, A002450.

Extensions

a(11)-a(14) from Charles R Greathouse IV, Jul 22 2016

A175665 The product of maximal run and minimal run lengths in the binary representation of n.

Original entry on oeis.org

1, 1, 4, 2, 1, 2, 9, 3, 2, 1, 2, 4, 2, 3, 16, 4, 3, 2, 2, 2, 1, 2, 3, 6, 2, 2, 2, 6, 3, 4, 25, 5, 4, 3, 3, 2, 2, 2, 3, 3, 2, 1, 2, 2, 2, 3, 4, 8, 3, 2, 4, 2, 2, 2, 3, 9, 3, 3, 3, 8, 4, 5, 36, 6, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 3, 4, 4, 3, 2, 2, 2, 1, 2, 3, 3, 2, 2, 2, 3, 3, 4, 5, 10, 4, 3, 6, 2, 2, 2, 6, 3
Offset: 1

Views

Author

Juri-Stepan Gerasimov, Aug 04 2010

Keywords

Crossrefs

Cf. A175599.

Formula

a(n)=A043276(n)*A175597(n).

Extensions

Corrected by D. S. McNeil, Nov 26 2010

A175609 The difference between maximal run length and minimal run length in binary representation of n-th prime.

Original entry on oeis.org

0, 0, 0, 0, 1, 1, 2, 1, 2, 2, 0, 1, 1, 1, 3, 1, 2, 3, 3, 2, 1, 3, 1, 1, 3, 1, 1, 1, 1, 2, 0, 4, 2, 2, 1, 2, 2, 2, 2, 1, 1, 1, 5, 4, 2, 1, 1, 4, 1, 2, 2, 3, 3, 4, 6, 4, 3, 3, 2, 2, 2, 1, 1, 2, 2, 3, 1, 2, 1, 2, 3, 2, 3, 2, 3, 6, 3, 2, 2, 1, 2, 1, 3, 2, 2, 2, 4, 2, 2, 2, 2, 4, 2, 3, 3, 4, 6, 4, 4, 3, 2, 2, 2, 2, 2
Offset: 1

Views

Author

Juri-Stepan Gerasimov, Jul 23 2010

Keywords

Programs

  • Mathematica
    rl[n_]:=Module[{spl=Length/@Split[IntegerDigits[Prime[n],2]]}, Max[spl]- Min[spl]]; rl/@Range[110] (* Harvey P. Dale, Jul 27 2011 *)

Formula

a(n)=A175599(A000040(n)).

A175681 The sum of maximal run and minimal run lengths in binary representation of n.

Original entry on oeis.org

2, 2, 4, 3, 2, 3, 6, 4, 3, 2, 3, 4, 3, 4, 8, 5, 4, 3, 3, 3, 2, 3, 4, 5, 3, 3, 3, 5, 4, 5, 10, 6, 5, 4, 4, 3, 3, 3, 4, 4, 3, 2, 3, 3, 3, 4, 5, 6, 4, 3, 4, 3, 3, 3, 4, 6, 4, 4, 4, 6, 5, 6, 12, 7, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 4, 5, 5, 4, 3, 3, 3, 2, 3, 4, 4, 3, 3, 3, 4, 4, 5, 6, 7, 5, 4, 5, 3, 3, 3, 5, 3, 3
Offset: 1

Views

Author

Juri-Stepan Gerasimov, Aug 08 2010

Keywords

Crossrefs

Cf. A175599, A175665.

Formula

a(n)=A043276(n)+A175597(n).
Showing 1-4 of 4 results.

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