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A031156
a(n) = 2^A031142(n).
1
1, 16, 128, 8192, 16384, 262144, 16777216, 134217728, 2147483648, 17179869184, 137438953472, 562949953421312, 2251799813685248, 147573952589676412928, 4722366482869645213696, 75557863725914323419136, 151115727451828646838272, 2417851639229258349412352, 77371252455336267181195264, 680564733841876926926749214863536422912
OFFSET
1,2
COMMENTS
Powers of 2 such that there is an increasing number of nonzero digits after the rightmost digit 0, including a leading 0. a(20)=2^129 is the first term where the rightmost 0 is not the leading 0. - Hugo Pfoertner, Apr 12 2020
CROSSREFS
Sequence in context: A067488 A308310 A120785 * A099195 A041486 A196642
KEYWORD
nonn,base
AUTHOR
STATUS
approved