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A175909 Decimal representation of the binary number formed by the concatenation of digits which are the same in both the left and right binary concatenations of the integers 1 to n. 0
1, 1, 7, 46, 29, 219, 495, 1502, 368357, 27603, 120539, 1797358, 462906349, 32361431, 33008607, 12857291758, 5972138981, 750631865, 99509722923, 13841055262, 31762354574285, 1019248986603, 8645573738319287 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..23.

MATHEMATICA

Module[{l, r, d}, l = {}; r = {}; Table[d = IntegerDigits[x, 2]; l = Flatten[{l, d}]; r = Flatten[{d, r}]; FromDigits[ Pick[l, EvenQ[l + r]], 2], {x, 1, DESIRED_NUMBER_OF_TERMS}]]

CROSSREFS

Cf. A047778, A098780

Sequence in context: A203201 A287064 A222901 * A034471 A100024 A171010

Adjacent sequences:  A175906 A175907 A175908 * A175910 A175911 A175912

KEYWORD

base,easy,nonn

AUTHOR

Dylan Hamilton, Oct 14 2010

STATUS

approved

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Last modified August 10 04:38 EDT 2020. Contains 336368 sequences. (Running on oeis4.)