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.

A356863 Numbers that are the product of two palindromes in two or more ways and are the concatenation of two palindromes, with all the palindromes having the same number of decimal digits.

Table of values

n a(n)
1 12
2 16
3 18
4 24
5 36
6 113131311886868688
7 153535351846464648
8 182919281817080718
9 183838381816161618
10 185676581814323418
11 192919291807080708
12 193838391806161608
13 283919382716080617
14 293656392403040304
15 293919392706080607
16 365838563634161436
17 385838583614161416
18 387676783612323216
19 567838765432161234
20 587838785412161214

List of values

[12, 16, 18, 24, 36, 113131311886868688, 153535351846464648, 182919281817080718, 183838381816161618, 185676581814323418, 192919291807080708, 193838391806161608, 283919382716080617, 293656392403040304, 293919392706080607, 365838563634161436, 385838583614161416, 387676783612323216, 567838765432161234, 587838785412161214]

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

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