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.

A347392 Numbers k such that nearest common ancestor of k and sigma(k) in Doudna tree (A347879) is the grandparent of k.

Table of values

n a(n)
1 8
2 9
3 12
4 13
5 24
6 35
7 160
8 455
9 42550
10 127650
11 8041950
12 22469750
13 58506250
14 67409250
15 175518750
16 394055550
17 4246782750

List of values

[8, 9, 12, 13, 24, 35, 160, 455, 42550, 127650, 8041950, 22469750, 58506250, 67409250, 175518750, 394055550, 4246782750]