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.

A213606 Greater of a pair (x,y) of consecutive terms of A045572 which are both semiprimes and such that the prime factors of x are adjacent primes to the factors of y.

Table of values

n a(n)
1 407
2 1007
3 110207
4 118007
5 418309
6 429493
7 439099
8 559007
9 1239871
10 1887241
11 2481467
12 2502979
13 3381407
14 3693421
15 5646259
16 6120407
17 6586007
18 6954769
19 7042663
20 8350007
21 11305097
22 13083407
23 13760207
24 17297521
25 21159421

List of values

[407, 1007, 110207, 118007, 418309, 429493, 439099, 559007, 1239871, 1887241, 2481467, 2502979, 3381407, 3693421, 5646259, 6120407, 6586007, 6954769, 7042663, 8350007, 11305097, 13083407, 13760207, 17297521, 21159421]

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

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