0,1

a(2)=A005244(28)=129: A139128(28)=#{26*5-1,65*2-1}=2.

Sequence in context: A095841 A004865 A006286 this_sequence A007608 A010343 A118169

Adjacent sequences: A139126 A139127 A139128 this_sequence A139130 A139131 A139132

nonn,more

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Apr 09 2008