cp's OEIS Frontend

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.

A309104 a(n) = Sum_{k >= 0} floor(n^(2*k+1) / (2*k+1)!).

Table of values

n a(n)
0 0
1 1
2 3
3 9
4 25
5 72
6 199
7 545
8 1487
9 4048
10 11007
11 29930
12 81371
13 221199
14 601295
15 1634499
16 4443044
17 12077466
18 32829974
19 89241138
20 242582585
21 659407853
22 1792456409
23 4872401708
24 13244561050
25 36002449653
26 97864804699
27 266024120286
28 723128532126
29 1965667148555

List of values

[0, 1, 3, 9, 25, 72, 199, 545, 1487, 4048, 11007, 29930, 81371, 221199, 601295, 1634499, 4443044, 12077466, 32829974, 89241138, 242582585, 659407853, 1792456409, 4872401708, 13244561050, 36002449653, 97864804699, 266024120286, 723128532126, 1965667148555]