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.

A020070 a(n) = floor( Gamma(n+7/8)/Gamma(7/8) ).

Original entry on oeis.org

1, 0, 1, 4, 18, 89, 523, 3598, 28341, 251531, 2483877, 27012163, 320769440, 4129906548, 57302453360, 852373993744, 13531437150692, 228343001917931, 4081631159283027, 77040788131467135, 1531185664112909314
Offset: 0

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Crossrefs

Programs

  • Magma
    [Floor(Gamma(n+7/8)/Gamma(7/8)): n in [0..25]]; // G. C. Greubel, Nov 17 2019
    
  • Maple
    Digits := 64:f := proc(n,x) trunc(GAMMA(n+x)/GAMMA(x)); end;
    seq(floor(pochhammer(7/8,n)), n = 0..25); # G. C. Greubel, Nov 17 2019
  • Mathematica
    Floor[Pochhammer[7/8, Range[0, 25]]] (* G. C. Greubel, Nov 17 2019 *)
  • PARI
    vector(26, n, my(x=7/8); gamma(n-1+x)\gamma(x) ) \\ G. C. Greubel, Nov 17 2019
    
  • Sage
    [floor(rising_factorial(7/8, n)) for n in (0..25)] # G. C. Greubel, Nov 17 2019

A020071 a(n) = floor( Gamma(n+5/8)/Gamma(5/8) ).

Original entry on oeis.org

1, 0, 1, 2, 9, 44, 251, 1665, 12700, 109544, 1054363, 11202616, 130230419, 1644159040, 22401666926, 327624378797, 5119130918712, 85105551523594, 1499985345603353, 27937227061862467, 548268081089050917
Offset: 0

Views

Author

Keywords

Crossrefs

Programs

  • Magma
    [Floor(Gamma(n+5/8)/Gamma(5/8)): n in [0..25]]; // G. C. Greubel, Nov 17 2019
    
  • Maple
    Digits := 64:f := proc(n,x) trunc(GAMMA(n+x)/GAMMA(x)); end;
    seq(floor(pochhammer(5/8,n)), n = 0..25); # G. C. Greubel, Nov 17 2019
  • Mathematica
    Floor[Pochhammer[5/8, Range[0, 25]]] (* G. C. Greubel, Nov 17 2019 *)
    Table[Floor[(Gamma[n+5/8])/Gamma[5/8]],{n,0,20}] (* Harvey P. Dale, Nov 24 2024 *)
  • PARI
    vector(26, n, my(x=5/8); gamma(n-1+x)\gamma(x) ) \\ G. C. Greubel, Nov 17 2019
    
  • Sage
    [floor(rising_factorial(5/8, n)) for n in (0..25)] # G. C. Greubel, Nov 17 2019

A020073 a(n) = floor( Gamma(n+1/8)/Gamma(1/8) ).

Original entry on oeis.org

1, 0, 0, 0, 0, 3, 19, 120, 861, 7000, 63875, 646742, 7195012, 87239530, 1145018831, 16173391001, 244622538902, 3944538439805, 67550220781671, 1224347751667801, 23415650750646695, 471239971356764753
Offset: 0

Views

Author

Keywords

Crossrefs

Programs

  • Magma
    [Floor(Gamma(n+1/8)/Gamma(1/8)): n in [0..25]]; // G. C. Greubel, Nov 17 2019
    
  • Maple
    Digits := 64:f := proc(n,x) trunc(GAMMA(n+x)/GAMMA(x)); end;
    seq(floor(pochhammer(1/8,n)), n = 0..25); # G. C. Greubel, Nov 17 2019
  • Mathematica
    Floor[Pochhammer[1/8, Range[0, 25]]] (* G. C. Greubel, Nov 17 2019 *)
  • PARI
    A020073(n)=if(n==0, 1, truncate(prod(i=1,n,n-i+1/8)) );
    for(n=0,30, print(A020073(n), " ")) \\ R. J. Mathar, Feb 07 2008
    
  • PARI
    vector(26, n, my(x=1/8); gamma(n-1+x)\gamma(x) ) \\ G. C. Greubel, Nov 17 2019
    
  • Sage
    [floor(rising_factorial(1/8, n)) for n in (0..25)] # G. C. Greubel, Nov 17 2019

A020027 Nearest integer to Gamma(n + 3/8)/Gamma(3/8).

Original entry on oeis.org

1, 0, 1, 1, 4, 18, 97, 620, 4570, 38270, 358778, 3722325, 42341447, 523975411, 7008171125, 100742459918, 1548915321246, 25363488385399, 440690610696307, 8097689971544645, 156892743198677493, 3196689642673053919
Offset: 0

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Comments

Gamma(n + 3/8)/Gamma(3/8) = 1, 3/8, 33/64, 627/512, 16929/4096, 592515/32768, 25478145/262144, ... - R. J. Mathar, Sep 04 2016

Crossrefs

Programs

  • Maple
    Digits := 64:f := proc(n,x) round(GAMMA(n+x)/GAMMA(x)); end;
  • Mathematica
    Table[Round[Gamma[n+3/8]/Gamma[3/8]],{n,0,30}] (* Harvey P. Dale, May 05 2022 *)
Showing 1-4 of 4 results.