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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.

A360278 Determinant of the matrix [L(j+k) + d(j,k)]_{1<=j, k<=n}, where L(n) denotes the Lucas number A000032(n), and d(j,k) is 1 or 0 according as j = k or not.

Table of values

n a(n)
1 4
2 16
3 44
4 121
5 319
6 841
7 2204
8 5776
9 15124
10 39601
11 103679
12 271441
13 710644
14 1860496
15 4870844
16 12752041
17 33385279
18 87403801
19 228826124
20 599074576
21 1568397604
22 4106118241
23 10749957119
24 28143753121
25 73681302244
26 192900153616
27 505019158604
28 1322157322201
29 3461452807999
30 9062201101801
31 23725150497404
32 62113250390416
33 162614600673844
34 425730551631121
35 1114577054219519

List of values

[4, 16, 44, 121, 319, 841, 2204, 5776, 15124, 39601, 103679, 271441, 710644, 1860496, 4870844, 12752041, 33385279, 87403801, 228826124, 599074576, 1568397604, 4106118241, 10749957119, 28143753121, 73681302244, 192900153616, 505019158604, 1322157322201, 3461452807999, 9062201101801, 23725150497404, 62113250390416, 162614600673844, 425730551631121, 1114577054219519]

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

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