|
|
A082563
|
|
a(1) = 3; for n>=1, a(n+1) is the smallest palindromic prime with a(n) as a central substring.
|
|
2
|
|
|
3, 131, 11311, 121131121, 1212113112121, 36121211311212163, 303612121131121216303, 7230361212113112121630327, 30723036121211311212163032703, 723072303612121131121216303270327, 1472307230361212113112121630327032741, 114723072303612121131121216303270327411
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
The minimal nested palindromic primes with seed 3; see A261881 for a guide to related sequences.
|
|
LINKS
|
|
|
EXAMPLE
|
As a triangle:
........3
.......131
......11311
....121131121
..1212113112121
36121211311212163
|
|
MATHEMATICA
|
s = {3}; Do[NestWhile[# + 1 &, 1, ! PrimeQ[tmp = FromDigits[Join[#, IntegerDigits[Last[s]], Reverse[#]] &[IntegerDigits[#]]]] &]; AppendTo[s, tmp], {15}]; s
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,base
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|