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.

A105999 Semiprimeth recurrence: a(0) = 1, a(n+1) = semiprime(a(n)) = A001358(a(n)).

Table of values

n a(n)
0 1
1 4
2 10
3 26
4 77
5 235
6 779
7 2785
8 10643
9 43697
10 192893
11 915218
12 4657929
13 25380749
14 147721169
15 916036271
16 6037442989
17 42191467826
18 311911160465
19 2434014941905
20 20007995450483
21 172911791611798
22 1568190042677867

List of values

[1, 4, 10, 26, 77, 235, 779, 2785, 10643, 43697, 192893, 915218, 4657929, 25380749, 147721169, 916036271, 6037442989, 42191467826, 311911160465, 2434014941905, 20007995450483, 172911791611798, 1568190042677867]

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

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