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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.

A152536 a(n) = Sum_{k=0..binomial(n,2)} (-1)^k*A152534(n,k).

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 3
5 6
6 10
7 23
8 47
9 110
10 246
11 617
12 1602
13 4035
14 11481
15 29927
16 95503
17 249926
18 871030
19 2316317
20 8879558
21 23674841
22 98329551
23 264329177
24 1191578522
25 3207278255
26 15543026747
27 42011308653
28 218668538441
29 591460307157
30 3285749117475
31 8905905152798
32 52700813279423

List of values

[1, 1, 1, 2, 3, 6, 10, 23, 47, 110, 246, 617, 1602, 4035, 11481, 29927, 95503, 249926, 871030, 2316317, 8879558, 23674841, 98329551, 264329177, 1191578522, 3207278255, 15543026747, 42011308653, 218668538441, 591460307157, 3285749117475, 8905905152798, 52700813279423]

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

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