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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.

A350813 a(n) is the least positive number k such that the product of the first n primes that are congruent to 1 (mod 4) is equal to y^2 - k^2 for some integer y.

Table of values

n a(n)
1 2
2 4
3 24
4 38
5 16
6 588
7 5782
8 5528
9 80872
10 319296
11 3217476
12 32301914
13 20085008
14 166518276
15 2049477188
16 17443412442
17 27905362944
18 233647747282
19 886295348972
20 134684992249108
21 98002282636962
22 392994156083892
23 5283713761100536
24 76642755213473624
25 923250078609721236

List of values

[2, 4, 24, 38, 16, 588, 5782, 5528, 80872, 319296, 3217476, 32301914, 20085008, 166518276, 2049477188, 17443412442, 27905362944, 233647747282, 886295348972, 134684992249108, 98002282636962, 392994156083892, 5283713761100536, 76642755213473624, 923250078609721236]

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

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