1,3
12101 = base 10 -> 121{12101}2 = base 3.
Cf. A038102-A038106.
Sequence in context: A030570 A039560 A009342 this_sequence A139592 A120552 A090220
Adjacent sequences: A038100 A038101 A038102 this_sequence A038104 A038105 A038106
nonn,base
Patrick De Geest (pdg(AT)worldofnumbers.com), Feb 15 1999.
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