A260871 - cp's OEIS frontend

A260871 Primes whose base-b representation is the concatenation of the base-b representations of (1, 2, ..., k, k-1, ..., 1), for some b > 1 and some k > 1.

n	a(n)
1	13
2	439
3	7069
4	27961
5	2864599
6	522134761
7	21107054541321649
8	12345678910987654321
9	1919434248892467772593071038679
10	24197857203266734883076090685781525281
11	1457624695486449811479514346937750581569993
12	1263023202979901596155544853826881857760357011832664659152364441

[13, 439, 7069, 27961, 2864599, 522134761, 21107054541321649, 12345678910987654321, 1919434248892467772593071038679, 24197857203266734883076090685781525281, 1457624695486449811479514346937750581569993, 1263023202979901596155544853826881857760357011832664659152364441]

cp's OEIS Frontend

A260871 Primes whose base-b representation is the concatenation of the base-b representations of (1, 2, ..., k, k-1, ..., 1), for some b > 1 and some k > 1.

Table of values

List of values