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.

A259161 Positive pentagonal numbers (A000326) that are triangular numbers (A000217) divided by 2.

Table of values

n a(n)
1 5
2 48510
3 465793515
4 4472549283020
5 42945417749765025
6 412361896760694487530
7 3959498889750770719498535
8 38019107927025003687930446040
9 365059470355795195660737423378045
10 3505300996337237541709397051345542550
11 33657899801770684519698434826282476187555

List of values

[5, 48510, 465793515, 4472549283020, 42945417749765025, 412361896760694487530, 3959498889750770719498535, 38019107927025003687930446040, 365059470355795195660737423378045, 3505300996337237541709397051345542550, 33657899801770684519698434826282476187555]

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

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