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 A238857 Array read by rows: row n lists total number of m-digit right-truncatable reversible primes in base n. 8
 0, 1, 1, 1, 0, 2, 1, 1, 0, 2, 4, 4, 2, 0, 3, 1, 1, 0, 3, 5, 3, 1, 0, 4, 7, 7, 5, 1, 0, 4, 5, 5, 3, 0, 4, 5, 6, 1, 0, 4, 8, 7, 9, 4, 1, 0, 5, 5, 7, 5, 0, 5, 10, 8, 4, 1, 1, 0, 6, 11, 17, 12, 3, 1, 0, 6, 11, 13, 6, 2, 1, 0, 6, 9, 11, 9, 4, 1, 0, 6, 13, 12, 7, 1, 0, 7, 9, 7, 1, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,6 COMMENTS For definitions and more comments, see A238854 and A238850. This is an irregular table with one line for every base, starting at 2, while the columns correspond to the number of digits (1,2,3,...). Each row terminates with a zero (in any given base there appears to be a finite number of instances). LINKS Stanislav Sykora, Table of n, a(n) for n = 2..5071 Stanislav Sykora, PARI/GP scripts for genetic threads, with code and comments. EXAMPLE These are the first rows of the table:    2: 0,    3: 1, 1, 1, 0,    4: 2, 1, 1, 0,    5: 2, 4, 4, 2, 0,    6: 3, 1, 1, 0,    7: 3, 5, 3, 1, 0,    8: 4, 7, 7, 5, 1, 0,    9: 4, 5, 5, 3, 0,   10: 4, 5, 6, 1, 0,   ... Hence, there are 6 right truncatable reversible primes with 3 digits in base 10 (see A238850). PROG (PARI) See the link. CROSSREFS Full in base 10: A238850, 16: A238851, 100: A238852, 256: A238853. In base n: A238854 (largest), A238855 (totals), A238856 (maximum digits). Cf. A007500, A023107, A024770, A237600, A237601, A237602. Sequence in context: A285229 A227425 A301636 * A253587 A110962 A065715 Adjacent sequences:  A238854 A238855 A238856 * A238858 A238859 A238860 KEYWORD nonn,tabf,base AUTHOR Stanislav Sykora, Mar 13 2014 STATUS approved

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Last modified August 20 12:41 EDT 2018. Contains 313917 sequences. (Running on oeis4.)