# [seqfan] Re: A063116

Neil Sloane njasloane at gmail.com
Wed Aug 21 21:56:58 CEST 2019

```You said:

"“Dimension of the space of weight 2n cusp forms for Gamma_0(48).”

(which means nothing to me...)."

Sorry to hear that!

Cusp forms are an important subject in number theory.  Part of the theory
of modular forms.
There are a huge number of books.  You might start by reading Gunning's
little Princeton book.
It will change your life.  The subject is sometimes referred to as a
fairyland of mathematics (with good reason).

There are also about 500 other sequences that mention cusp forms.

Best regards
Neil

Neil J. A. Sloane, President, OEIS Foundation.
11 South Adelaide Avenue, Highland Park, NJ 08904, USA.
Also Visiting Scientist, Math. Dept., Rutgers University, Piscataway, NJ.
Email: njasloane at gmail.com

On Wed, Aug 21, 2019 at 3:39 PM David Sycamore via SeqFan <
seqfan at list.seqfan.eu> wrote:

> Hello Seqfans,
>
> The Name of the above sequence says:
>
> “Dimension of the space of weight 2n cusp forms for Gamma_0(48).”
>
> (which means nothing to me...).
>
> Data: 3,18,34,66,82,98,114,130,146,162....
>
> Can anyone please explain what is meant by the Name? There is a link
> entitled “Dimensions of the spaces S_k(Gamma_0(N))” but it leads to a
> message saying “Sorry, the website....cannot be found”. Also there are no
>
> A formula a(n)=2(8n-7) is conjectured, which seems to work.
>
> Unless I am mistaken another possible formula for these terms could be:
>
> a(n)= A(B(n-1)+1) - A(B(n-2)+1) , for n>1
>
> Where A is A000217 and B is A016813.
>
>
> Cheers,
>
> David.
>
>
>
>
> --
> Seqfan Mailing list - http://list.seqfan.eu/
>

```