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.

A254676 Heptagonal numbers (A000566) which are also centered triangular numbers (A005448).

Table of values

n a(n)
1 1
2 235
3 2839
4 902101
5 10906669
6 3465871039
7 41903418691
8 13315875628969
9 160992923703385
10 51159590700627091
11 618534770964985711
12 196555134155933653885
13 2376410429054551397509
14 755164774267506397598311
15 9130168249892815504243099
16 2901342866180625423639056209

List of values

[1, 235, 2839, 902101, 10906669, 3465871039, 41903418691, 13315875628969, 160992923703385, 51159590700627091, 618534770964985711, 196555134155933653885, 2376410429054551397509, 755164774267506397598311, 9130168249892815504243099, 2901342866180625423639056209]

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

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