cp's OEIS Frontend

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.

A177484 The number of permutations having one non-overlapping occurrence of 122'1'.

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 6
5 54
6 468
7 3864
8 32032
9 269696
10 2321536
11 20798448
12 193509888
13 1897735488
14 19460711424
15 211113010752
16 2395487617024
17 28720852065280
18 359273073631232
19 4735262021189376
20 64904470318448640
21 934415802987420672
22 13945275766952386560
23 217951935041766097920

List of values

[0, 0, 0, 0, 6, 54, 468, 3864, 32032, 269696, 2321536, 20798448, 193509888, 1897735488, 19460711424, 211113010752, 2395487617024, 28720852065280, 359273073631232, 4735262021189376, 64904470318448640, 934415802987420672, 13945275766952386560, 217951935041766097920]

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

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