1,2
a(n) = A000041(A003586(n)).
Cf. A117220, A117222, A090184.
Sequence in context: A155954 A087581 A049888 this_sequence A073879 A073880 A118332
Adjacent sequences: A117218 A117219 A117220 this_sequence A117222 A117223 A117224
nonn
Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 04 2006
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