A083118 Index of zeros in A083116 and A083117.

10, 16, 20, 25, 30, 32, 40, 48, 50, 60, 64, 70, 75, 80, 90, 96, 100, 110, 112, 120, 125, 128, 130, 140, 144, 150, 160, 170, 175, 176, 180, 190, 192, 200, 208, 210, 220, 224, 225, 230, 240, 250, 256, 260, 270, 272, 275, 280, 288, 290, 300, 304, 310, 320, 325, 330, 336, 340

Offset: 1

Author

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Apr 23 2003

Keywords

• base
• easy
• nonn

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).

Crossrefs

Cf. A083116, A083117.

Programs

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

Extensions

Data section corrected and more terms from Karl-Heinz Hofmann, Nov 02 2023