Numbers k such that the k-th semiprime == 7 (mod k).

Terms

a(0) =1a(1) =7a(2) =9a(3) =66a(4) =6675a(5) =6918a(6) =613374a(7) =613412a(8) =613418a(9) =613422a(10) =613428a(11) =613434a(12) =613510a(13) =613512a(14) =613514a(15) =613520a(16) =613542a(17) =58155531a(18) =58155569a(19) =58155572a(20) =6384425518a(21) =6384425556a(22) =819217006165a(23) =819217006175a(24) =819217006199a(25) =819217006203a(26) =819217006227a(27) =819217006665a(28) =819217006869