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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.

A274705 Rectangular array read by ascending antidiagonals. Row n has the exponential generating function 1/M_{n}(z^n) where M_{n}(z) is the n-th Mittag-Leffler function, nonzero coefficients only, for n>=1.

Table of values

n a(n)
0 1
1 1
2 -2
3 1
4 -3
5 3
6 1
7 -4
8 25
9 -4
10 1
11 -5
12 133
13 -427
14 5
15 1
16 -6
17 621
18 -15130
19 12465
20 -6
21 1
22 -7
23 2761
24 -437593
25 4101799
26 -555731
27 7
28 1
29 -8
30 11999
31 -12012016
32 1026405753
33 -2177360656
34 35135945
35 -8
36 1
37 -9
38 51465
39 -325204171
40 243458990271
41 -6054175060941
42 1999963458217
43 -2990414715
44 9

List of values

[1, 1, -2, 1, -3, 3, 1, -4, 25, -4, 1, -5, 133, -427, 5, 1, -6, 621, -15130, 12465, -6, 1, -7, 2761, -437593, 4101799, -555731, 7, 1, -8, 11999, -12012016, 1026405753, -2177360656, 35135945, -8, 1, -9, 51465, -325204171, 243458990271, -6054175060941, 1999963458217, -2990414715, 9]