OFFSET
1,1
COMMENTS
Conjecture: There are approximately k(n-1)(n-2)^(n-2) terms of this sequence up to 10^n, where k is about e/(19e-19). - Charles R Greathouse IV, Oct 13 2022
LINKS
Chai Wah Wu, Table of n, a(n) for n = 1..12794 (all terms < 10^11)
MATHEMATICA
d19Q[n_]:=Module[{idn=IntegerDigits[n]}, Total[idn]==19&&MemberQ[ Partition[ idn, 2, 1], {1, 9}]]; Select[19*Range[20000], d19Q] (* Harvey P. Dale, Jun 10 2014 *)
PROG
(Python)
def ok(n): s = str(n); return n%19==0 and '19' in s and sum(map(int, s))==19
print(list(filter(ok, range(205000)))) # Michael S. Branicky, Aug 06 2021
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Hassan Taifour (hytaifour(AT)yahoo.co.uk), Sep 10 2006
EXTENSIONS
More terms from Zak Seidov, Sep 12 2006
STATUS
approved