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A118711 Integers n such that the n-th triangular number t_n has all its base 12 digits contained in {1,5,7,11}. +0
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1, 13, 61, 82, 898, 2962, 2989, 9133, 20077, 20653, 28669, 29266, 35581, 35842, 37501, 99133, 236674, 286717, 424621, 424957, 821698, 941650, 1704301, 1722370, 2978413, 3328258, 4494466, 10022317, 40392829, 49870141, 50668882, 53933053 (list; graph; listen)
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Last modified December 6 19:58 EST 2009. Contains 170429 sequences.


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