1,1
a(n)=A000041(A000668(n)).
a(3)=6842 because the 3rd Mersenne prime is A000668(3)=31 and the partition number of 31 is A000041(31)=6842.
Sequence in context: A202621 A076046 A202380 * A004002 A194604 A078355
Adjacent sequences: A134804 A134805 A134806 * A134808 A134809 A134810
nonn
Omar E. Pol (info(AT)polprimos.com), Nov 13 2007