Number of (s,2) gates.

Terms

a(0) =2a(1) =7a(2) =18a(3) =42a(4) =90a(5) =186a(6) =368a(7) =710a(8) =1334a(9) =2458a(10) =4441a(11) =7903a(12) =13850a(13) =23964a(14) =40957a(15) =69247a(16) =115871a(17) =192096a(18) =315651a(19) =514484a(20) =832111a(21) =1336213a(22) =2131098a(23) =3377177a(24) =5319289a(25) =8330146a(26) =12973661a(27) =20100410a(28) =30986771a(29) =47542095