a(n) = A080313(n)/2.

Terms

a(0) =1a(1) =28a(2) =460a(3) =496a(4) =7372a(5) =7408a(6) =8128a(7) =7948a(8) =7984a(9) =117964a(10) =118000a(11) =118720a(12) =118540a(13) =118576a(14) =130060a(15) =130096a(16) =130240a(17) =127180a(18) =127216a(19) =130816a(20) =127936a(21) =127756a(22) =127792a(23) =1887436a(24) =1887472a(25) =1888192a(26) =1888012a(27) =1888048a(28) =1899532a(29) =1899568