a(n) = 82*2^n + 440.

Terms

a(0) =522a(1) =604a(2) =768a(3) =1096a(4) =1752a(5) =3064a(6) =5688a(7) =10936a(8) =21432a(9) =42424a(10) =84408a(11) =168376a(12) =336312a(13) =672184a(14) =1343928a(15) =2687416a(16) =5374392a(17) =10748344a(18) =21496248a(19) =42992056a(20) =85983672a(21) =171966904a(22) =343933368a(23) =687866296a(24) =1375732152a(25) =2751463864a(26) =5502927288a(27) =11005854136a(28) =22011707832a(29) =44023415224