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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.

A377583 Expansion of e.g.f. (1 + x * exp(x))^4.

Table of values

n a(n)
0 1
1 4
2 20
3 108
4 616
5 3620
6 21624
7 129892
8 778208
9 4621572
10 27080680
11 156080804
12 883304976
13 4905620356
14 26743018904
15 143219056740
16 754280089024
17 3911369843204
18 19995029207496
19 100885122939172
20 502952669726960
21 2480084192804484
22 12107351426245240
23 58565261434872548

List of values

[1, 4, 20, 108, 616, 3620, 21624, 129892, 778208, 4621572, 27080680, 156080804, 883304976, 4905620356, 26743018904, 143219056740, 754280089024, 3911369843204, 19995029207496, 100885122939172, 502952669726960, 2480084192804484, 12107351426245240, 58565261434872548]

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

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