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.

A097638 a(n) is the smallest n-digit number m such that 10*m+1, 10*m+3, 10*m+7 & 10*m+9 are primes.

Table of values

n a(n)
1 1
2 10
3 148
4 1300
5 10111
6 100234
7 1001395
8 10000546
9 100002526
10 1000005742
11 10000000753
12 100000012369
13 1000000005658
14 10000000094572
15 100000000006744
16 1000000000134649
17 10000000000032523
18 100000000000043071
19 1000000000000213927
20 10000000000000256116
21 100000000000000008172

List of values

[1, 10, 148, 1300, 10111, 100234, 1001395, 10000546, 100002526, 1000005742, 10000000753, 100000012369, 1000000005658, 10000000094572, 100000000006744, 1000000000134649, 10000000000032523, 100000000000043071, 1000000000000213927, 10000000000000256116, 100000000000000008172]

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

Content is available under The OEIS End-User License Agreement.