Smallest multiple of n with a prime signature different from all previous terms.

Terms

a(0) =1a(1) =2a(2) =6a(3) =4a(4) =20a(5) =24a(6) =42a(7) =8a(8) =36a(9) =60a(10) =176a(11) =72a(12) =312a(13) =210a(14) =180a(15) =16a(16) =544a(17) =144a(18) =912a(19) =320a(20) =420a(21) =792a(22) =2208a(23) =216a(24) =800a(25) =1560a(26) =243a(27) =896a(28) =4176a(29) =900