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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.

A218498 6th iteration of the hyperbinomial transform on the sequence of 1's.

Table of values

n a(n)
0 1
1 7
2 61
3 649
4 8257
5 123217
6 2120545
7 41484625
8 911339617
9 22249542241
10 598364232529
11 17591851634353
12 561695417002225
13 19366094448215665
14 717377453802538753
15 28423991158962139873
16 1199873992182732076225
17 53772852099331738315969
18 2550272224743737587911025

List of values

[1, 7, 61, 649, 8257, 123217, 2120545, 41484625, 911339617, 22249542241, 598364232529, 17591851634353, 561695417002225, 19366094448215665, 717377453802538753, 28423991158962139873, 1199873992182732076225, 53772852099331738315969, 2550272224743737587911025]

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

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