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A098780 First n numbers in binary representation concatenated in reverse order. 3
1, 5, 29, 157, 1437, 13725, 128413, 1176989, 20051357, 355595677, 6261175709, 109340390813, 1896046785949, 32682372363677, 560447953696157, 9567647208437149, 315812421869630877, 10692105963331253661 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

a(n)=n*A000079(A070939(a(n-1)))+a(n-1); a(1) = 1.

FORMULA

a(n) = n*2^(1+floor[log2(a(n-1))]) + a(n-1); a(1) = 1.

EXAMPLE

a(4) = (4 3 2 1) -> (100 11 10 1) -> 10011101 -> 157.

CROSSREFS

Cf. A047778, A007088.

Sequence in context: A198764 A065541 A060926 * A146178 A015537 A141812

Adjacent sequences:  A098777 A098778 A098779 * A098781 A098782 A098783

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 04 2004

EXTENSIONS

Typo in data corrected by D. S. McNeil, Aug 20 2010

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Last modified February 17 00:09 EST 2012. Contains 205978 sequences.