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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.

A070775 a(n) = Sum_{k=0..n} binomial(4*n,4*k).

Table of values

n a(n)
0 1
1 2
2 72
3 992
4 16512
5 261632
6 4196352
7 67100672
8 1073774592
9 17179738112
10 274878431232
11 4398044413952
12 70368752566272
13 1125899873288192
14 18014398643699712
15 288230375614840832
16 4611686020574871552
17 73786976286248271872
18 1180591620751771041792
19 18889465931341141901312

List of values

[1, 2, 72, 992, 16512, 261632, 4196352, 67100672, 1073774592, 17179738112, 274878431232, 4398044413952, 70368752566272, 1125899873288192, 18014398643699712, 288230375614840832, 4611686020574871552, 73786976286248271872, 1180591620751771041792, 18889465931341141901312]

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

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