Small rhombicuboctahedron with faces of centered polygons.

Terms

a(0) =1a(1) =51a(2) =245a(3) =679a(4) =1449a(5) =2651a(6) =4381a(7) =6735a(8) =9809a(9) =13699a(10) =18501a(11) =24311a(12) =31225a(13) =39339a(14) =48749a(15) =59551a(16) =71841a(17) =85715a(18) =101269a(19) =118599a(20) =137801a(21) =158971a(22) =182205a(23) =207599a(24) =235249a(25) =265251a(26) =297701a(27) =332695a(28) =370329a(29) =410699