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.

A178530 Numbers k with the property that there exist nonnegative integers a and b such that k = concat(a,b) = a^2+b^2.

Table of values

n a(n)
1 0
2 1
3 100
4 101
5 1233
6 8833
7 10100
8 990100
9 5882353
10 94122353
11 1765038125
12 2584043776
13 7416043776
14 8235038125
15 116788321168
16 123288328768
17 876712328768
18 883212321168
19 7681802663025
20 8896802846976
21 13793103448276
22 15348303604525
23 84651703604525
24 86206903448276
25 91103202846976
26 92318202663025
27 106058810243728

List of values

[0, 1, 100, 101, 1233, 8833, 10100, 990100, 5882353, 94122353, 1765038125, 2584043776, 7416043776, 8235038125, 116788321168, 123288328768, 876712328768, 883212321168, 7681802663025, 8896802846976, 13793103448276, 15348303604525, 84651703604525, 86206903448276, 91103202846976, 92318202663025, 106058810243728]

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

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