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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.

A308323 a(n) = Sum_{i_1=0..n} Sum_{i_2=0..n} ... Sum_{i_n=0..n} (-1)^(i_1 + i_2 + ... + i_n) * multinomial(i_1 + i_2 + ... + i_n; i_1, i_2, ..., i_n).

Table of values

n a(n)
0 1
1 0
2 3
3 -692
4 25413205
5 -247578134832564
6 1049539393188856278390451
7 -2871690441592604257533055860715129272
8 7040796701370550878156702345258827433898638874681737
9 -20490586759699718697495728993626502030472234718733294544426997558792280

List of values

[1, 0, 3, -692, 25413205, -247578134832564, 1049539393188856278390451, -2871690441592604257533055860715129272, 7040796701370550878156702345258827433898638874681737, -20490586759699718697495728993626502030472234718733294544426997558792280]

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

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