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A147537 Numbers whose binary representation is the concatenation of 2n-1 digits 1 and n digits 0. 6
2, 28, 248, 2032, 16352, 131008, 1048448, 8388352, 67108352, 536869888, 4294965248, 34359734272, 274877898752, 2199023239168, 17592186011648, 140737488289792, 1125899906711552, 9007199254478848, 72057594037403648 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) is the number whose binary representation is A138118(n).

LINKS

Table of n, a(n) for n=1..19.

Index entries for linear recurrences with constant coefficients, signature (10,-16).

FORMULA

a(n) = 2^(n-1)*(4^n-2). a(n) = 10*a(n-1)-16*a(n-2). G.f.: 2*x*(4*x+1)/((2*x-1)*(8*x-1)). [Colin Barker, Nov 04 2012]

MATHEMATICA

Table[FromDigits[Join[Table[1, {2n - 1}], Table[0, {n}]], 2], {n, 1, 20}] (* Stefan Steinerberger, Nov 11 2008 *)

CROSSREFS

Cf. A138118.

Sequence in context: A001759 A243475 A019441 * A183067 A056261 A230270

Adjacent sequences:  A147534 A147535 A147536 * A147538 A147539 A147540

KEYWORD

base,easy,nonn

AUTHOR

Omar E. Pol, Nov 06 2008

EXTENSIONS

More terms from Stefan Steinerberger, Nov 11 2008

STATUS

approved

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Last modified November 20 06:06 EST 2018. Contains 317385 sequences. (Running on oeis4.)