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.

A221575 Number of 0..n arrays of length 5 with each element differing from at least one neighbor by something other than 1.

Table of values

n a(n)
1 6
2 57
3 342
4 1293
5 3734
6 8991
7 19014
8 36497
9 64998
10 109059
11 174326
12 267669
13 397302
14 572903
15 805734
16 1108761
17 1496774
18 1986507
19 2596758
20 3348509
21 4265046
22 5372079
23 6697862
24 8273313
25 10132134
26 12310931
27 14849334
28 17790117
29 21179318
30 25066359

List of values

[6, 57, 342, 1293, 3734, 8991, 19014, 36497, 64998, 109059, 174326, 267669, 397302, 572903, 805734, 1108761, 1496774, 1986507, 2596758, 3348509, 4265046, 5372079, 6697862, 8273313, 10132134, 12310931, 14849334, 17790117, 21179318, 25066359]

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

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