A324472 a(n) = 1000 mod n.

0, 0, 1, 0, 0, 4, 6, 0, 1, 0, 10, 4, 12, 6, 10, 8, 14, 10, 12, 0, 13, 10, 11, 16, 0, 12, 1, 20, 14, 10, 8, 8, 10, 14, 20, 28, 1, 12, 25, 0, 16, 34, 11, 32, 10, 34, 13, 40, 20, 0, 31, 12, 46, 28, 10, 48, 31, 14, 56, 40, 24, 8, 55, 40, 25, 10, 62, 48, 34, 20, 6, 64, 51, 38, 25, 12, 76

Offset: 1

Author

N. J. A. Sloane, Mar 07 2019, following a suggestion from Charles Kusniec

Keywords

• nonn
• easy

Examples

			a(98) = 1000 mod 98 = 20 as 1000 = 98 * 10 + 20. - _David A. Corneth_, Mar 07 2019
		

Links

• David A. Corneth, Table of n, a(n) for n = 1..10000
• Index entries for linear recurrences with constant coefficients, signature (1).

Crossrefs

Cf. A018766, A018767, A048158, A051127, A090976, A324471.

Programs

Mathematica

Mod[1000,Range[100]] (* Paolo Xausa, Nov 14 2023 *)

PARI

a(n) = 1000 % n \\ David A. Corneth, Mar 07 2019

Formula

a(n) = 1000 for n >= 1001.

a(n) = 0 <=> n in { A018767 }.

a(n) = 1 <=> n > 1 and n in { A018766 }.