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.

A166355 Diagonal sums of exponential Riordan array [1+x*tan(x/2),x], A166353.

Table of values

n a(n)
0 1
1 2
2 5
3 15
4 64
5 443
6 4887
7 78996
8 1745995
9 50333929
10 1829758158
11 81753825477
12 4399497764477
13 280491321580150
14 20898005984605281
15 1798558057748753171
16 177034863818072607020
17 19758697171102806823327

List of values

[1, 2, 5, 15, 64, 443, 4887, 78996, 1745995, 50333929, 1829758158, 81753825477, 4399497764477, 280491321580150, 20898005984605281, 1798558057748753171, 177034863818072607020, 19758697171102806823327]

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

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