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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.

A033190 a(n) = Sum_{k=0..n} binomial(n,k) * binomial(Fibonacci(k)+1,2).

Table of values

n a(n)
0 0
1 1
2 3
3 9
4 28
5 90
6 297
7 1001
8 3431
9 11917
10 41820
11 147918
12 526309
13 1881009
14 6744843
15 24244145
16 87300092
17 314765506
18 1135980801
19 4102551897
20 14823628015
21 53581222773
22 193724727804
23 700551945014
24 2533702591613
25 9164618329825
26 33151607475987
27 119927166988761

List of values

[0, 1, 3, 9, 28, 90, 297, 1001, 3431, 11917, 41820, 147918, 526309, 1881009, 6744843, 24244145, 87300092, 314765506, 1135980801, 4102551897, 14823628015, 53581222773, 193724727804, 700551945014, 2533702591613, 9164618329825, 33151607475987, 119927166988761]

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

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