OFFSET
1,1
LINKS
Chai Wah Wu, Table of n, a(n) for n = 1..10000
EXAMPLE
The 10th pandigital 1023457896 has prime decomposition 2^3*3^3*59*80309 and 80309 is indeed the a(10)=7864th prime, i.e., prime(7864)=80309.
MATHEMATICA
PrimePi[FactorInteger[#][[-1, 1]]]&/@(Select[Sort[FromDigits/@ Permutations[ Range[0, 9]]], IntegerLength[#]>9&, 50]) (* Harvey P. Dale, Jun 06 2018 *)
PROG
(Python)
from itertools import permutations, islice
from sympy import primepi, primefactors
def A071924(n): return primepi(max(primefactors(next(islice((int(e+''.join(d)) for e in '123456789' for d in permutations('0123456789'.replace(e, ''), 9)), n-1, None))))) # Chai Wah Wu, Dec 07 2021
CROSSREFS
KEYWORD
nonn,base,fini
AUTHOR
Lekraj Beedassy, Jun 14 2002
EXTENSIONS
a(24)-a(33) from Donovan Johnson, Jan 25 2009
Edited by Charles R Greathouse IV, Aug 02 2010
Keyword "fini" added by Sean A. Irvine, Aug 21 2024
STATUS
approved