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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.

A185509 Fourth accumulation array, T, of the natural number array A000027, by antidiagonals.

Table of values

n a(n)
1 1
2 6
3 7
4 22
5 41
6 28
7 63
8 146
9 161
10 84
11 154
12 406
13 561
14 476
15 210
16 336
17 966
18 1526
19 1631
20 1176
21 462
22 672
23 2058
24 3556
25 4361
26 3976
27 2562
28 924
29 1254
30 4032
31 7434
32 9996
33 10486
34 8568
35 5082
36 1716
37 2211
38 7392
39 14322
40 20580
41 23716
42 22344
43 16842
44 9372
45 3003
46 3718
47 12837
48 25872
49 39102
50 48216
51 49980
52 43512
53 30822
54 16302
55 5005
56 6006
57 21307
58 44352
59 69762
60 90552
61 100548
62 96432
63 79002
64 53262
65 27027
66 8008
67 9373
68 34034
69 72787
70 118272
71 159852

List of values

[1, 6, 7, 22, 41, 28, 63, 146, 161, 84, 154, 406, 561, 476, 210, 336, 966, 1526, 1631, 1176, 462, 672, 2058, 3556, 4361, 3976, 2562, 924, 1254, 4032, 7434, 9996, 10486, 8568, 5082, 1716, 2211, 7392, 14322, 20580, 23716, 22344, 16842, 9372, 3003, 3718, 12837, 25872, 39102, 48216, 49980, 43512, 30822, 16302, 5005, 6006, 21307, 44352, 69762, 90552, 100548, 96432, 79002, 53262, 27027, 8008, 9373, 34034, 72787, 118272, 159852]

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

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