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A376103
a(1) = 5; for n > 1, a(n) is the smallest palindromic prime containing exactly 2 more digits on each end than a(n-1), with a(n-1) as the central substring.
0
5, 10501, 111050111, 1211105011121, 39121110501112193, 393912111050111219393, 7239391211105011121939327, 79723939121110501112193932797, 157972393912111050111219393279751, 7415797239391211105011121939327975147
OFFSET
1,1
COMMENTS
This is a finite sequence since at a(10) there is no way to add 2 more digits and reach a palindromic prime.
EXAMPLE
As a triangle:
5
10501
111050111
1211105011121
39121110501112193
CROSSREFS
KEYWORD
nonn,base,fini,full
AUTHOR
Shyam Sunder Gupta, Sep 10 2024
STATUS
approved