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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.

A097463 Let P(i) = i-th prime. To get a(n), factor P(n)-1 as a product of primes, then concatenate the exponents.

Table of values

n a(n)
1 0
2 1
3 2
4 11
5 101
6 21
7 4
8 12
9 10001
10 2001
11 111
12 22
13 301
14 1101
15 100000001
16 200001
17 1000000001
18 211
19 11001
20 1011
21 32
22 110001
23 1000000000001
24 30001
25 51
26 202
27 1100001
28 1000000000000001
29 23
30 4001
31 1201
32 101001
33 3000001
34 110000001
35 200000000001

List of values

[0, 1, 2, 11, 101, 21, 4, 12, 10001, 2001, 111, 22, 301, 1101, 100000001, 200001, 1000000001, 211, 11001, 1011, 32, 110001, 1000000000001, 30001, 51, 202, 1100001, 1000000000000001, 23, 4001, 1201, 101001, 3000001, 110000001, 200000000001]

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

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