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A211345 a(n) is the largest n-digit number whose last k digits are divisible by the k-th prime for k = 1..n. 0

%I #19 Dec 23 2021 09:35:36

%S 8,96,990,9800,99660,881400,9747630,81377000,904719030

%N a(n) is the largest n-digit number whose last k digits are divisible by the k-th prime for k = 1..n.

%C There are 9 terms in the sequence and the 9-digit number 904719030 is the largest number to satisfy the requirements.

%e There are five one-digit numbers divisible by first prime and the largest is 8 so a(1)=8.

%e For 2-digit numbers, the tens digit must make it divisible by 3, which gives 96 as the largest to satisfy the requirement, so a(2)=96.

%Y Cf. A079212.

%K nonn,base,fini,full

%O 1,1

%A _Shyam Sunder Gupta_, Aug 07 2013

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Last modified September 18 03:49 EDT 2024. Contains 375995 sequences. (Running on oeis4.)