A378024 - OEIS

%I #20 Dec 01 2024 11:40:04

%S 1913268348854,11788,1557,126357,145,1038,1757,116,153,10,11,12,13,14,

%T 15,16,17,18,19,10,21,11,23,12,25,13,27,14,29,10,31,16,11,17,35,12,37,

%U 19,13,10,41,14,43,11,15,23,47,12,49,10,17,13,53,18,11,14,19,29,59,10,61

%N Smallest k >= 10 whose decimal representation read in base (n+10) is a multiple of k.

%C This is a variation of A139285 that has terms beyond n=10.

%e a(5)=145 because 145 read in base 15 is 1*15^2+4*15+5=290 = 2*145 and no other number below 145 has this property except for the trivial values < 10.

%o (PARI) a(n) = my(k=10); while(fromdigits(digits(k), n+10) % k, k++); k; \\ _Michel Marcus_, Nov 16 2024

%Y Cf. A139285.

%K base,nonn

%O 1,1

%A _Sergio Pimentel_, Nov 14 2024

%E More terms from _Michel Marcus_, Nov 16 2024