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A112417 Sequence is generated as in A048985, but primes are instead written in decreasing order before being concatenated. 1

%I #9 Apr 09 2014 10:16:58

%S 1,2,3,10,5,14,7,42,15,22,11,58,13,30,23,170,17,62,19,90,31,46,23,234,

%T 45,54,63,122,29,94,31,682,47,70,61,250,37,78,55,362,41,126,43,186,95,

%U 94,47,938,63,182,71,218,53,254,93,490,79,118,59,378,61,126,127,2730

%N Sequence is generated as in A048985, but primes are instead written in decreasing order before being concatenated.

%H Diana Mecum, <a href="/A112417/b112417.txt">Table of n, a(n) for n = 1..847</a>

%e 12 = 3 * 2^2, with prime divisors written in descending order.

%e So we have 3 = 11 binary, 2 = 10 binary, 2 = 10 binary, which is (after concatenation) 111010. So a(12) is 111010 = 58 when converted from binary to decimal.

%Y Cf. A004676, A048985.

%K base,nonn

%O 1,2

%A _Leroy Quet_, Dec 09 2005

%E More terms from _Diana L. Mecum_, Jul 14 2007

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Last modified March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)