Numbers k such that k and k+3 are in A002822.

Terms

a(0) =2a(1) =7a(2) =30a(3) =100a(4) =107a(5) =135a(6) =172a(7) =217a(8) =322a(9) =352a(10) =452a(11) =562a(12) =590a(13) =667a(14) =707a(15) =917a(16) =940a(17) =975a(18) =1092a(19) =1127a(20) =1222a(21) =1470a(22) =1570a(23) =1950a(24) =2282a(25) =2545a(26) =2772a(27) =2865a(28) =2930a(29) =3007