Here are the numbers that are used when there is no noun following them:
0 a náid zeroBonnleibheal_1/Aonad_1/EU9_00.mp3 1 a haon oneBonnleibheal_1/Aonad_1/EU9_01.mp3 2 a dó twoBonnleibheal_1/Aonad_1/EU9_02.mp3 3 a trí threeBonnleibheal_1/Aonad_1/EU9_03.mp3 4 a ceathair fourBonnleibheal_1/Aonad_1/EU9_04.mp3 5 a cúig fiveBonnleibheal_1/Aonad_1/EU9_05.mp3 6 a sé sixBonnleibheal_1/Aonad_1/EU9_06.mp3 7 a seacht sevenBonnleibheal_1/Aonad_1/EU9_07.mp3 8 a hocht eightBonnleibheal_1/Aonad_1/EU9_08.mp3 9 a naoi nineBonnleibheal_1/Aonad_1/EU9_09.mp3 10 a deich tenBonnleibheal_1/Aonad_1/EU9_10.mp3