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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.

A344068 Expansion of Product_{k>=1} (1 + 9^(k-1)*x^k).

Table of values

n a(n)
0 1
1 1
2 9
3 90
4 810
5 8019
6 72900
7 715149
8 6495390
9 63772920
10 579270690
11 5643903420
12 51613018479
13 499772430810
14 4567687565310
15 44250780833091
16 404188047763920
17 3894703308072990
18 35764052204589030
19 342923118899865390
20 3146016498406236720
21 30187757787717436380
22 276843069234653897241

List of values

[1, 1, 9, 90, 810, 8019, 72900, 715149, 6495390, 63772920, 579270690, 5643903420, 51613018479, 499772430810, 4567687565310, 44250780833091, 404188047763920, 3894703308072990, 35764052204589030, 342923118899865390, 3146016498406236720, 30187757787717436380, 276843069234653897241]

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

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