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 1-2 of 2 results.

A107444 a(n) = C(n^3, n).

Original entry on oeis.org

1, 28, 2925, 635376, 234531275, 131513824548, 104200375748469, 110859231254749120, 152494520486567153895, 263409560461970212832400, 558225230412816157198777770, 1424174931670379304734465767920, 4305884331150027666756637066361970, 15224493238177464079881126301239927128
Offset: 1

Views

Author

Zak Seidov, May 26 2005

Keywords

Crossrefs

Cf. A014062 (C(n^2, n)), A359665.

Programs

  • Magma
    [Binomial(n^3, n): n in [1..30]]; // Vincenzo Librandi, Apr 22 2011
    
  • Mathematica
    Table[Binomial[n^3, n], {n, 12}]
  • PARI
    vector(100,n,binomial(n^3,n))

Formula

a(n) ~ exp(n) * n^(2*n - 1/2) / sqrt(2*Pi). - Vaclav Kotesovec, Jan 10 2023

A295773 a(n) = Sum_{k=0..n} binomial(k^2, k).

Original entry on oeis.org

1, 2, 8, 92, 1912, 55042, 2002834, 87903418, 4514068786, 265401903136, 17575711359576, 1294325676386112, 104913619501093500, 9281271920245432932, 889811788303594625412, 91895379599481072720852, 10170646981621794947354052, 1200909691326112843842751962
Offset: 0

Views

Author

Vaclav Kotesovec, Nov 27 2017

Keywords

Crossrefs

Programs

  • Magma
    [&+[Binomial(k^2, k): k in [0..n]]: n in [0..20]]; // Vincenzo Librandi, Jan 10 2019
  • Mathematica
    Table[Sum[Binomial[k^2, k], {k, 0, n}], {n, 0, 20}]
  • PARI
    a(n) = sum(k=0, n, binomial(k^2, k)); \\ Michel Marcus, Jan 10 2019
    

Formula

a(n) ~ exp(n - 1/2) * n^(n - 1/2) / sqrt(2*Pi).
Showing 1-2 of 2 results.