a(n)=(A175580(n)-1)/210.

Terms

a(0) =119780a(1) =2414666a(2) =2908657a(3) =4490299a(4) =4953531a(5) =5826247a(6) =8561356a(7) =10479027a(8) =10911407a(9) =10976186a(10) =11569974a(11) =14657196a(12) =16710617a(13) =17777969a(14) =18556503a(15) =19129781a(16) =22607167a(17) =23082807a(18) =23543359a(19) =25241957a(20) =26655168a(21) =32729717