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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.

A124450 Lesser of a pair of not necessarily distinct closest primes that add up to 10^n.

Table of values

n a(n)
1 5
2 47
3 491
4 4919
5 49877
6 499943
7 4999913
8 49999757
9 499999931
10 4999999937
11 49999999811
12 499999999769
13 4999999998431
14 49999999999619
15 499999999999769
16 4999999999998557
17 49999999999998887
18 499999999999999679
19 4999999999999999661
20 49999999999999998647

List of values

[5, 47, 491, 4919, 49877, 499943, 4999913, 49999757, 499999931, 4999999937, 49999999811, 499999999769, 4999999998431, 49999999999619, 499999999999769, 4999999999998557, 49999999999998887, 499999999999999679, 4999999999999999661, 49999999999999998647]

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

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