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A224714 The number of unordered partitions {a,b} of the odd numbers 2n-1 such that one of a and b is composite and the other is prime. 1

%I #6 Apr 21 2013 23:27:43

%S 0,0,0,1,2,4,3,4,6,5,6,8,7,9,9,8,9,11,11,10,12,11,12,14,13,15,15,14,

%T 16,16,15,16,18,18,17,19,18,19,21,21,20,22,21,23,23,22,24,24,24,23,25,

%U 24,25,27,26,27,29,28,30,30,30,30,30,30,29,31,30,32,32

%N The number of unordered partitions {a,b} of the odd numbers 2n-1 such that one of a and b is composite and the other is prime.

%H J. Stauduhar, <a href="/A224714/b224714.txt">Table of n, a(n) for n = 1..10000</a>

%Y Subsequence of A224712.

%K nonn

%O 1,5

%A _J. Stauduhar_, Apr 21 2013

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)