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.

A327417 a(n) = A291451(2*n, n).

Original entry on oeis.org

1, 1, 682, 7128576, 429120851544, 94066556834970720, 57496301859366489159040, 82247725949165261902606309120, 243263294602173417290925789755652480, 1356449073308047884259226117174893156252800, 13275987570857688650109290727617026478737341900800
Offset: 0

Views

Author

Peter Luschny, Sep 14 2019

Keywords

Crossrefs

Cf. A007820 (m=1), A327416 (m=2), this sequence (m=3), A327418 (m=4).
Associated triangles: A048993 (m=1), A156289 (m=2), A291451 (m=3), A291452 (m=4).

Programs

  • Sage
    # uses[P from A327416]
def A327417(n): return P(3, 2*n).list()[n]//factorial(n)
print([A327417(n) for n in range(11)])

A327418 a(n) = A291452(2*n, n).

Original entry on oeis.org

1, 1, 8255, 2941884000, 11957867341948125, 294040106448733743008625, 30188472144950452369737153667500, 10143939867539251013312279527292897925000, 9389957475743686923255643914812959599614184703125, 21058194888200109612591474039339954750056969537259132421875
Offset: 0

Views

Author

Peter Luschny, Sep 14 2019

Keywords

Crossrefs

Cf. A007820 (m=1), A327416 (m=2), A327417 (m=3), this sequence (m=4).
Associated triangles: A048993 (m=1), A156289 (m=2), A291451 (m=3), A291452 (m=4).

Programs

  • Sage
    # uses[P from A327416]
def A327418(n): return P(4, 2*n).list()[n]//factorial(n)
print([A327418(n) for n in range(10)])
Showing 1-2 of 2 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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