s(n)=1, where s=A030757.

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =9a(5) =12a(6) =14a(7) =20a(8) =23a(9) =28a(10) =37a(11) =40a(12) =42a(13) =49a(14) =52a(15) =64a(16) =67a(17) =81a(18) =99a(19) =102a(20) =103a(21) =106a(22) =121a(23) =124a(24) =145a(25) =148a(26) =153a(27) =172a(28) =185a(29) =202