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.

A271548 Numbers k such that 4*10^k + 19 is prime.

Table of values

n a(n)
1 0
2 1
3 2
4 3
5 9
6 11
7 19
8 27
9 31
10 36
11 42
12 69
13 86
14 98
15 152
16 205
17 533
18 587
19 1302
20 1506
21 1521
22 1573
23 1807
24 3906
25 6461
26 9081
27 11766
28 12595
29 15697
30 17154
31 30507
32 36074
33 52667
34 61367
35 122377
36 169759

List of values

[0, 1, 2, 3, 9, 11, 19, 27, 31, 36, 42, 69, 86, 98, 152, 205, 533, 587, 1302, 1506, 1521, 1573, 1807, 3906, 6461, 9081, 11766, 12595, 15697, 17154, 30507, 36074, 52667, 61367, 122377, 169759]