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.

A095916 Differences between adjacent digits of Pi.

Original entry on oeis.org

-2, 3, -3, 4, 4, -7, 4, -1, -2, 2, 3, 1, -2, 2, -6, -1, 1, 5, -4, 2, -4, 4, -2, -1, 0, 5, -5, -1, 5, 2, -4, -5, 2, 6, 0, -4, -3, 8, -2, -6, 5, 3, -6, 6, 0, -6, 4, -2, -4, -1, 5, 3, -6, -2, 9, -2, -3, 5, -5, 0, 1, 4, -7, 1, -3, 7, 1, -7, 5, -2, -4, 6, -4, 6, -2, -4, -2, 8, 1, 0, -1, -2, -4, 6, -8, 3, 1, 4, -6, 3, -2, 1, -2, -1, 0, 6, -7, 6, 1, 2
Offset: 1

Views

Author

Herman Jamke (hermanjamke(AT)fastmail.fm), Jul 13 2004

Keywords

Comments

a(A049514(n)) = 0. - Reinhard Zumkeller, Mar 12 2015

Links

Crossrefs

Cf. A000796, A138345.
Cf. A049514, A030658, A193496.

Programs

  • Haskell
    a095916 n = a095916_list !! (n-1)
a095916_list = zipWith (-) (tail a000796_list) a000796_list
-- Reinhard Zumkeller, Mar 12 2015
  • Mathematica
    b = RealDigits[N[Pi, 1000]]; b = First[b]; a = {}; Do[k = b[[n + 1]] - b[[n]]; AppendTo[a, k], {n, 1, 999}]; a (* Artur Jasinski, Mar 16 2008 *)
Differences[RealDigits[Pi,10,120][[1]]] (* Harvey P. Dale, Feb 10 2013 *)

A095942 Differences between adjacent digits of e.

Original entry on oeis.org

5, -6, 7, -6, 6, -7, 7, -6, 6, -4, 1, 4, -9, 4, 1, -3, 1, 2, -2, 3, -6, 2, 6, -1, -3, 3, -6, 2, 2, -3, 4, 0, -4, 2, 5, -2, 0, -2, 2, -5, 2, 3, -7, 9, -6, 3, 3, 0, 0, -4, 4, -4, 2, -3, 5, -3, 0, 3, -3, 1, -1, -4, 5, 0, -5, 2, -4, 7, -1, 0, -3, -3, 3, 2, -2, 2, -1, 3, -2, 4, -5, 1, 2, -6, 2, 5, -6, -1, 6, 1, -3, -3, 3, -4, 5, 0, -2, -2, 5, -3
Offset: 1

Views

Author

Herman Jamke (hermanjamke(AT)fastmail.fm), Jul 13 2004

Keywords

Crossrefs

Cf. A001113, A138345.

Programs

  • Mathematica
    b = RealDigits[N[E, 1000]]; b = First[b]; a = {}; Do[k = b[[n + 1]] - b[[n]]; AppendTo[a, k], {n, 1, 999}]; a (* Artur Jasinski, Mar 16 2008 *)
Differences[RealDigits[E,10,120][[1]]] (* Harvey P. Dale, Dec 27 2018 *)

Extensions

More terms from Artur Jasinski, Mar 16 2008

A138344 Absolute values of first differences of A049541.

Original entry on oeis.org

2, 7, 5, 3, 9, 1, 0, 2, 5, 7, 5, 4, 2, 9, 6, 1, 6, 4, 2, 4, 0, 1, 1, 2, 3, 4, 1, 3, 1, 5, 2, 6, 1, 5, 2, 4, 6, 2, 1, 8, 8, 7, 7, 8, 3, 4, 8, 9, 8, 1, 6, 1, 2, 3, 5, 4, 2, 0, 1, 2, 2, 0, 7, 0, 6, 0, 2, 6, 2, 4, 4, 3, 4, 2, 4, 1, 2, 3, 7, 7, 1, 7, 8, 2, 0, 5, 1, 6, 5, 0, 2, 1, 3, 5, 6, 5, 6, 6, 8, 8, 1, 1, 3, 1, 1
Offset: 0

Views

Author

Artur Jasinski, Mar 16 2008

Keywords

Crossrefs

Cf. A049541, A138345.

Programs

  • Mathematica
    Abs[Differences[RealDigits[1/Pi,10,120][[1]]]] (* Harvey P. Dale, Dec 17 2022 *)

Formula

a(n) = abs(A049541(n+1) - A049541(n)). - Michel Marcus, Nov 04 2013

A138361 First differences of A068985.

Original entry on oeis.org

3, 1, 1, -1, 2, -5, 0, -3, 0, 6, -6, 3, 0, -2, 1, -1, -1, 4, 4, -4, 0, -3, 1, 4, 0, -7, 1, 5, -5, 3, 2, -6, 8, -2, 1, -3, 0, 1, 3, -7, 0, 0, 2, -2, -1, 3, -2, 6, -1, 1, 1, -5, 1, 1, -5, 7, 1, -5, 3, 2, -8, 1, 5, 3, -2, -3, 2, -5, 3, 5, -4, 2, -3, 0, 4, 1, 0, -1, -8, 3, 0, 2, 2, -6, 3, 3, -5, 5, -3, -1, 1, 1, 4, -8, 8, -3, -2, -1, 4, -3, 2, 0, -4, 5, -4, -1, 3
Offset: 1

Views

Author

Artur Jasinski, Mar 16 2008

Keywords

Crossrefs

Cf. A068985, A095916, A095942, A138345.

Programs

  • Mathematica
    b = RealDigits[N[1/E, 1000]]; b = First[b]; a = {}; Do[k = b[[n + 1]] - b[[n]]; AppendTo[a, k], {n, 1, 999}]; a (*Artur Jasinski*)
Differences[RealDigits[1/E,10,120][[1]]] (* Harvey P. Dale, Sep 14 2016 *)
Showing 1-4 of 4 results.

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