Numbers k = A005574(m) such that k = (A005574(m-1)+A005574(m+1))/2.

Terms

a(0) =4a(1) =10a(2) =20a(3) =120a(4) =130a(5) =180a(6) =230a(7) =260a(8) =440a(9) =470a(10) =680a(11) =700a(12) =750a(13) =920a(14) =1060a(15) =1320a(16) =1736a(17) =1860a(18) =1970a(19) =2106a(20) =2320a(21) =2460a(22) =2760a(23) =2850a(24) =2890a(25) =3074a(26) =3660a(27) =3800a(28) =4180a(29) =4370