cp's OEIS Frontend

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.

A001756 a(n) = A059366(n,n-3) = A059366(n,3) for n >= 3, where the triangle A059366 arises from the expansion of a trigonometric integral.

Table of values

n a(n)
3 15
4 60
5 450
6 4500
7 55125
8 793800
9 13097700
10 243243000
11 5016886875
12 113716102500
13 2808787731750
14 75071235739500
15 2158298027510625
16 66409170077250000
17 2177272076104125000
18 75769068248423550000
19 2789248824895091934375
20 108288483790044745687500

List of values

[15, 60, 450, 4500, 55125, 793800, 13097700, 243243000, 5016886875, 113716102500, 2808787731750, 75071235739500, 2158298027510625, 66409170077250000, 2177272076104125000, 75769068248423550000, 2789248824895091934375, 108288483790044745687500]