A071363 Largest n-digit prime with strictly increasing digits.

7, 89, 569, 5689, 34679, 345689, 1456789, 23456789

Offset

1,1

Comments

Notice the terms with consecutive digits; search for 23456789 to find several related sequences including A006055, A052017 and A052077.

Links

Table of n, a(n) for n=1..8.

Example

a(1) = A052015(4), a(2) = A052015(15), a(3) = A052015(35), a(4) = A052015(61), ... In short, a(n) = A052015(b(n)) with b = (4, 15, 35, 61, 81, 94, 98, 100). - M. F. Hasler, May 03 2017

Prog

(PARI) A071363(n, u=vectorv(n, i, 10^(n-i)))={forvec(d=vector(n, i, [1, 9]), isprime(d*u)&&n=d*u, 2); n} \\ M. F. Hasler, May 03 2017

Crossrefs

Cf. A071362, A071360, A071361, A007810.

Subsequence of A052015.

Sequence in context: A301925 A036902 A142204 * A174616 A089394 A068692

Adjacent sequences: A071360 A071361 A071362 * A071364 A071365 A071366

Keyword

base,fini,full,nonn

Author

Rick L. Shepherd, May 21 2002

Status

approved