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A155700
Minimum power to which 2 must be raised so that the first n digits of the result are the digits of A155699(n).
1
53, 279, 3973, 28721, 325127, 6101578, 44699964, 345060753
OFFSET
1,1
EXAMPLE
The powers of 2 having at least 2 digits are 16, 32, 64, 128, 256, ...; discarding all but their first 2 digits yields the sequence 16, 32, 64, 12, 25, ..., in which all 90 of the possible 2-digit numbers (10 through 99) eventually appear; the last to appear is 97 (at 2^279 = 9.713...*10^83), so a(2) = 279.
CROSSREFS
Sequence in context: A253119 A253112 A211146 * A108878 A096325 A140042
KEYWORD
nonn,base,more
AUTHOR
Jon E. Schoenfield, Jan 25 2009
STATUS
approved