a(n) = A121295(n) - A121263(n).

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =0a(10) =45a(11) =134a(12) =309a(13) =652a(14) =1323a(15) =2634a(16) =5193a(17) =10184a(18) =19911a(19) =38854a(20) =133040a(21) =412527a(22) =1241773a(23) =3701864a(24) =10999194a(25) =32642353a(26) =96825335a(27) =287134794a(28) =851344708a(29) =2523819059