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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.

A385252 Number of ternary strings of length 2*n that have at least one 0 but less 0's than the combined number of 1's and 2's.

Table of values

n a(n)
0 0
1 0
2 32
3 432
4 4608
5 45440
6 432896
7 4051712
8 37535744
9 345470976
10 3165315072
11 28905857024
12 263303921664
13 2393675661312
14 21725991600128
15 196937443377152
16 1783243502256128
17 16132632204541952
18 145839502212988928
19 1317564268289196032
20 11896995094093365248
21 107375812426273390592

List of values

[0, 0, 32, 432, 4608, 45440, 432896, 4051712, 37535744, 345470976, 3165315072, 28905857024, 263303921664, 2393675661312, 21725991600128, 196937443377152, 1783243502256128, 16132632204541952, 145839502212988928, 1317564268289196032, 11896995094093365248, 107375812426273390592]

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

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