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.

A376419 a(n) = prime(1+n)*A024451(n-1) - A024451(n), where A024451(n) is the numerator of Sum_{i = 1..n} 1/prime(i).

Table of values

n a(n)
1 -1
2 0
3 4
4 94
5 284
6 9398
7 50692
8 2354158
9 75006408
10 445719928
11 53055577416
12 1055507209474
13 16217635288124
14 1663779309692618
15 115680647722172136
16 5515487010932110572
17 76943944440184239772
18 17660133817084175986164
19 686773689508904350332526
20 19312334585726976150166616
21 5276558856319725444255594528
22 245447734128317092747434820766

List of values

[-1, 0, 4, 94, 284, 9398, 50692, 2354158, 75006408, 445719928, 53055577416, 1055507209474, 16217635288124, 1663779309692618, 115680647722172136, 5515487010932110572, 76943944440184239772, 17660133817084175986164, 686773689508904350332526, 19312334585726976150166616, 5276558856319725444255594528, 245447734128317092747434820766]

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

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