a(n) = n times the Collatz number of n (as given in A006577).

Terms

a(0) =0a(1) =2a(2) =21a(3) =8a(4) =25a(5) =48a(6) =112a(7) =24a(8) =171a(9) =60a(10) =154a(11) =108a(12) =117a(13) =238a(14) =255a(15) =64a(16) =204a(17) =360a(18) =380a(19) =140a(20) =147a(21) =330a(22) =345a(23) =240a(24) =575a(25) =260a(26) =2997a(27) =504a(28) =522a(29) =540