Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #8 Jan 12 2019 03:27:02
%S 3,6,11,19,20,35,58,99,96,154,242,407,375,573,1331,861,1435,1282,1886,
%T 2745,4539,3961,9279,5667,8038,13208,11323,15836,22001,35960,30383,
%U 41715,120351,56953,92670,77363,104566,247050,140668,227999,188397
%N Number of partitions of n-th composite number not containing the smallest prime factor.
%C a(n) = A000041(A002808(n)) - A091114(n).
%C a(n) = A000041(A002808(n)) - A000041(A085271(n)). - _Charlie Neder_, Jan 11 2019
%Y Cf. A002808, A000041, A020639, A056608.
%K nonn
%O 1,1
%A _Reinhard Zumkeller_, Feb 22 2004
%E Incorrect formula removed by _Charlie Neder_, Jan 11 2019