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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.

A178693 Numerators of coefficients of Maclaurin series for 2 - sqrt(1 - x - x^2).

Table of values

n a(n)
0 1
1 1
2 5
3 5
4 45
5 95
6 465
7 1165
8 24445
9 65595
10 359915
11 1003315
12 11342185
13 32415435
14 187063145
15 544172445
16 25508284445
17 75196195795
18 445774614215
19 1327748661015
20 15887874844835
21 47715177777185
22 287618252461095
23 869652752181595

List of values

[1, 1, 5, 5, 45, 95, 465, 1165, 24445, 65595, 359915, 1003315, 11342185, 32415435, 187063145, 544172445, 25508284445, 75196195795, 445774614215, 1327748661015, 15887874844835, 47715177777185, 287618252461095, 869652752181595]

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

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