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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.

A372145 Number of domino tilings of the order n Aztec diamond which are centrally symmetric.

Table of values

n a(n)
0 1
1 2
2 4
3 12
4 48
5 288
6 2304
7 26880
8 430080
9 10035200
10 321126400
11 14836039680
12 949506539520
13 87734404251648
14 11230003744210944
15 2064716402685640704
16 528567399087524020224
17 194361783607326689722368
18 99513233206951265137852416
19 72958995691997968023051829248
20 74710011588605919255605073149952

List of values

[1, 2, 4, 12, 48, 288, 2304, 26880, 430080, 10035200, 321126400, 14836039680, 949506539520, 87734404251648, 11230003744210944, 2064716402685640704, 528567399087524020224, 194361783607326689722368, 99513233206951265137852416, 72958995691997968023051829248, 74710011588605919255605073149952]

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

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