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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.

A308296 a(n) = (1/n!) * Sum_{i_1=1..n} Sum_{i_2=1..n} ... Sum_{i_n=1..n} multinomial(i_1+i_2+...+i_n; i_1, i_2, ... , i_n).

Table of values

n a(n)
0 1
1 1
2 7
3 842
4 7958726
5 15467641899285
6 10893033763705794846727
7 4247805448772073978048752721163278
8 1299618941291522676629215597535104557826094801396
9 419715170056359079715862408734598208208707081189266290220651371206

List of values

[1, 1, 7, 842, 7958726, 15467641899285, 10893033763705794846727, 4247805448772073978048752721163278, 1299618941291522676629215597535104557826094801396, 419715170056359079715862408734598208208707081189266290220651371206]

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

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