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(Concatenation 1,2,3,...,n) mod n.
4

%I #12 Nov 22 2022 02:56:00

%S 0,0,0,2,0,0,5,6,0,0,4,0,4,4,0,12,15,0,16,0,3,4,6,12,0,16,0,8,3,0,18,

%T 28,15,16,25,0,14,10,33,20,27,24,27,4,0,36,35,12,29,0,48,4,14,0,15,4,

%U 18,28,3,0,28,60,45,60,55,48,13,52,0,50,14,36,12,72,0,20,4,72,74,60,54,24,65

%N (Concatenation 1,2,3,...,n) mod n.

%H Michael S. Branicky, <a href="/A095221/b095221.txt">Table of n, a(n) for n = 1..10000</a>

%F a(n) = A007908(n) mod n. - _Michel Marcus_, Nov 21 2022

%e a(4) = 1234 mod 4 = 2.

%o (Python)

%o from itertools import count, islice

%o def agen():

%o s = "0"

%o for n in count(1): s += str(n); yield int(s)%n

%o print(list(islice(agen(), 83))) # _Michael S. Branicky_, Nov 21 2022

%Y Cf. A007908, A094151.

%K base,nonn,easy

%O 1,4

%A _Amarnath Murthy_, Jun 10 2004

%E More terms from _John W. Layman_, Jul 29 2005