1,1

81 is present because 5^81-4 is prime.

Sequence in context: A003429 A076860 A067589 this_sequence A116048 A120282 A132094

Adjacent sequences: A059610 A059611 A059612 this_sequence A059614 A059615 A059616

nonn

Andrey Kulsha (Andrey_601(AT)tut.by), Feb 07 2001

No other terms below 10000.