a(n) is the smallest number in Spanish with n consonants.

Terms

a(0) =1a(1) =2a(2) =3a(3) =14a(4) =22a(5) =23a(6) =32a(7) =33a(8) =53a(9) =132a(10) =133a(11) =153a(12) =232a(13) =233a(14) =253a(15) =353a(16) =1253a(17) =1353a(18) =2253a(19) =2353a(20) =3353a(21) =14353a(22) =22353a(23) =23353a(24) =32353a(25) =33353a(26) =53353