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A053559 Primes formed by concatenating n consecutive increasing numbers starting with a palindrome and ending with the next consecutive palindrome. 0
23, 67, 89, 131132133134135136137138139140141 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The next term, a(5) = 90809...90909, has 505 digits. - M. F. Hasler, Sep 11 2018

LINKS

Table of n, a(n) for n=1..4.

PROG

(PARI) P=1; until(, N=P; for(x=1+P, P=A262038(1+P), N=N*10^(logint(x, 10)+1)+x); ispseudoprime(N)&& print(N", ")) \\ M. F. Hasler, Sep 11 2018

CROSSREFS

Cf. A000040, A002113.

Sequence in context: A241212 A052087 A030458 * A322414 A031376 A069173

Adjacent sequences:  A053556 A053557 A053558 * A053560 A053561 A053562

KEYWORD

base,nonn

AUTHOR

G. L. Honaker, Jr., Jan 16 2000

STATUS

approved

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Last modified November 23 21:51 EST 2020. Contains 338603 sequences. (Running on oeis4.)