Intersection of A108027, A108028, A108029 and A108030.

Terms

a(0) =0a(1) =260a(2) =1770a(3) =3914a(4) =10074a(5) =11390a(6) =12734a(7) =14454a(8) =17024a(9) =20580a(10) =21834a(11) =21854a(12) =25404a(13) =29784a(14) =30470a(15) =31800a(16) =33230a(17) =37694a(18) =39530a(19) =41490a(20) =45164a(21) =49134a(22) =54594a(23) =57834a(24) =60894a(25) =66480a(26) =68174a(27) =68550a(28) =71994a(29) =72024