A030286 Palindromic primes whose digits do not appear in previous term and that are increasing.

2, 3, 5, 7, 11, 353, 727, 919, 30203, 71917, 3002003, 7114117, 9002009, 111181111, 300020003, 711161117, 900050009, 11112721111, 30000500003, 71112121117, 90005450009, 1111118111111, 3000002000003, 7111144411117, 9000005000009, 111111181111111, 300000020000003

Offset

1,1

Comments

From Michael S. Branicky, Feb 28 2025: (Start)

The sequence enforces a(n) > a(n-1); else, a(7) = 101 would be the first difference.

a(1386) has 1001 digits. (End)

Links

Michael S. Branicky, Table of n, a(n) for n = 1..1385

Michael S. Branicky, Python program

Prog

(Python) # see linked program

Crossrefs

Sequence in context: A029980 A046481 A082625 * A046484 A346168 A062888

Adjacent sequences: A030283 A030284 A030285 * A030287 A030288 A030289

Keyword

nonn,base,changed

Author

Patrick De Geest

Extensions

a(25) and beyond from Michael S. Branicky, Feb 28 2025

Status

approved