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A267731 as a simple table

na(n)
115
2225
33375
439330
5451278
64705642
747293550
8453985015
94225323881
1038217977443
11337785304853
122925589051944
1324901832826668
14208741721350212
151726400790939232
1614108352548185285
17114068503433280219

[15,225,3375,39330,451278,4705642,47293550,
 453985015,4225323881,38217977443,337785304853,
 2925589051944,24901832826668,208741721350212,
 1726400790939232,14108352548185285,
 114068503433280219]