A115299 - OEIS

%I #10 Dec 12 2023 16:29:55

%S 2,4,6,8,10,12,14,16,18,1,2,3,4,5,6,7,8,9,10,2,3,4,5,6,7,8,9,10,11,3,

%T 4,5,6,7,8,9,10,11,12,4,5,6,7,8,9,10,11,12,13,5,6,7,8,9,10,11,12,13,

%U 14,6,7,8,9,10,11,12,13,14,15,7,8,9,10,11,12,13,14,15,16,8,9,10,11,12,13,14

%N Greatest digit of n + least digit of n. Different from A088133.

%C a(101) = 1 and A088133(101) = 2, but all previous terms match.

%H Michael S. Branicky, <a href="/A115299/b115299.txt">Table of n, a(n) for n = 1..10000</a>

%e a(1) = 1 + 1 = 2, a(232) = 3 + 2 = 5, a(1889009898) = 9 + 0 = 9.

%t Array[Max[#] + Min[#] &@ IntegerDigits[#] &, 120] (* _Michael De Vlieger_, Dec 12 2023 *)

%o (Python)

%o def a(n): d = list(map(int, str(n))); return max(d) + min(d)

%o print([a(n) for n in range(1, 87)]) # _Michael S. Branicky_, Dec 12 2023

%Y Cf. A037904 (greatest-least), A115300 (greatest*least), A088133 (first+last).

%K base,nonn

%O 1,1

%A _Rick L. Shepherd_, Jan 20 2006