OFFSET
1,1
COMMENTS
Numbers that do not divide a number obtained by concatenating a single digit any number of times.
Numbers divisible by either 10 or 16 or 25. - Karl-Heinz Hofmann, Nov 02 2023
REFERENCES
Amarnath Murthy, "On the divisors of the Smarandache Unary sequence," Smarandache Notions Journal, Volume 11, 1-2-3, Spring 2000.
LINKS
Karl-Heinz Hofmann, Table of n, a(n) for n = 1..10000
Index entries for linear recurrences with constant coefficients, signature (2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -2, 2, -1).
PROG
(Python)
print([n for n in range(2, 1000) if not n % 10 or not n % 16 or not n % 25])
# Karl-Heinz Hofmann, Nov 02 2023
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Apr 23 2003
EXTENSIONS
Data section corrected and more terms from Karl-Heinz Hofmann, Nov 02 2023
STATUS
approved