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A284060 Primes that are left-, left/right-, and right-truncatable. 0
2, 3, 5, 7, 23, 37, 53, 73, 373, 3137, 3797 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Intersection of A020994 and A077390. Only the last three terms exhibit all three properties nontrivially.
LINKS
EXAMPLE
The prime 3797 is a term because it is a term of A024785 (truncating from the left: 797, 97, 7 are primes), of A077390 (truncating the same number of digits from left and from right: 79 is a prime), and of A024770 (truncating from the right: 379, 37, 3 are primes). The digit 9 is not a prime, so 3797 is not also a term of A085823.
CROSSREFS
Cf. A020994, A024770, A024785, A077390, A085823 (a subsequence).
Sequence in context: A177061 A020994 A085823 * A211682 A100552 A210566
KEYWORD
nonn,base,fini,full
AUTHOR
Rick L. Shepherd, Mar 19 2017
STATUS
approved

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Last modified May 21 19:35 EDT 2024. Contains 372738 sequences. (Running on oeis4.)