1,1
If t=10, then t1 = 101 (prime).
If t=180, then t1 = 1801 (prime).
If t=420, then t1 = 4201 (prime).
Sequence in context: A055514 A055233 A104045 this_sequence A108777 A000132 A060317
Adjacent sequences: A102543 A102544 A102545 this_sequence A102547 A102548 A102549
nonn,base
Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Feb 24 2005
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