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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.

A134326 The sum of the elements in the first, middle and last row of the n-th power of the 9-by-9 matrix defined in the formula.

Table of values

n a(n)
0 3
1 11
2 34
3 112
4 359
5 1167
6 3764
7 12191
8 39391
9 127434
10 411973
11 1332290
12 4307638
13 13928919
14 45036841
15 145621921
16 470842799
17 1522389829
18 4922341763
19 15915370482
20 51458800352
21 166380151440
22 537950254595
23 1739329494378

List of values

[3, 11, 34, 112, 359, 1167, 3764, 12191, 39391, 127434, 411973, 1332290, 4307638, 13928919, 45036841, 145621921, 470842799, 1522389829, 4922341763, 15915370482, 51458800352, 166380151440, 537950254595, 1739329494378]

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

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