A213605 - cp's OEIS frontend

A213605 Lesser of a pair (x,y) of consecutive terms of A045572 (numbers coprime to 2*5), both semiprimes and such that the prime factors of x are adjacent primes to the factors of y.

n	a(n)
1	403
2	1003
3	110203
4	118003
5	418307
6	429491
7	439097
8	559003
9	1239869
10	1887239
11	2481463
12	2502977
13	3381403
14	3693419
15	5646257
16	6120403
17	6586003
18	6954767
19	7042661
20	8350003
21	11305093
22	13083403
23	13760203
24	17297519
25	21159419

[403, 1003, 110203, 118003, 418307, 429491, 439097, 559003, 1239869, 1887239, 2481463, 2502977, 3381403, 3693419, 5646257, 6120403, 6586003, 6954767, 7042661, 8350003, 11305093, 13083403, 13760203, 17297519, 21159419]

cp's OEIS Frontend

A213605 Lesser of a pair (x,y) of consecutive terms of A045572 (numbers coprime to 2*5), both semiprimes and such that the prime factors of x are adjacent primes to the factors of y.

Table of values

List of values