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.

A116309 Numbers k such that k*(k+3) gives the concatenation of two numbers m and m+3.

Table of values

n a(n)
1 40
2 58
3 32262232
4 67737766
5 79321056
6 3341093417798787499093
7 3861488851737861033961
8 4747922651210186579787
9 5252077348789813420211
10 6138511148262138966037
11 6658906582201212500905
12 7232275368591793618231

List of values

[40, 58, 32262232, 67737766, 79321056, 3341093417798787499093, 3861488851737861033961, 4747922651210186579787, 5252077348789813420211, 6138511148262138966037, 6658906582201212500905, 7232275368591793618231]

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

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