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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.

A349267 Generalized Euler numbers, a(n) = n!*[x^n](sec(8*x)*2*(sin(4*x) + cos(4*x))).

Table of values

n a(n)
0 2
1 8
2 96
3 1408
4 29184
5 739328
6 22634496
7 806453248
8 32864600064
9 1506300919808
10 76717014122496
11 4297849713983488
12 262665886073094144
13 17390688314209599488
14 1239981021847665770496
15 94727563504456856240128
16 7719096548270543600615424
17 668321603392783694711226368

List of values

[2, 8, 96, 1408, 29184, 739328, 22634496, 806453248, 32864600064, 1506300919808, 76717014122496, 4297849713983488, 262665886073094144, 17390688314209599488, 1239981021847665770496, 94727563504456856240128, 7719096548270543600615424, 668321603392783694711226368]

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

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