Array read by rows: T(m,n) is the number of m-digit semiprimes with last digit n, 0 <= n <= 9.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =0a(6) =1a(7) =0a(8) =0a(9) =1a(10) =1a(11) =3a(12) =3a(13) =2a(14) =4a(15) =7a(16) =3a(17) =3a(18) =2a(19) =3a(20) =0a(21) =39a(22) =19a(23) =38a(24) =20a(25) =38a(26) =20a(27) =29a(28) =21a(29) =41