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A108241
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Numbers n such that concatenating n and the sum of factorials of the digits of n produces a triangular number.
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0
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0, 3, 18, 122, 2111, 12442, 40850, 113347, 202343, 233506, 332600, 435405, 525544, 546233, 554161, 716795, 1000334, 1016217, 1142240, 1244630, 2240515, 2414603, 3103412, 3203757, 3400440, 3413651, 3424213, 3461244, 4430222, 5226150
(list; graph; refs; listen; history; internal format)
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