Powerful numbers that are the least integer of their prime signature.
1, 4, 8, 16, 32, 36, 64, 72, 128, 144, 216, 256, 288, 432, 512, 576, 864, 900, 1024
2 seqfan posts
Mon Jun 11 18:45:23 CEST 2012 [seqfan] Re: Second signature: Two language questions