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 A164943 Decimal value of the concatenation of first n odd numbers in binary. 1
 1, 7, 61, 495, 7929, 126875, 2030013, 32480223, 1039367153, 33259748915, 1064311965301, 34057982889655, 1089855452468985, 34875374479007547, 1116011983328241533, 35712383466503729087, 2285592541856238661601 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Harvey P. Dale, Table of n, a(n) for n = 1..383 EXAMPLE a(3)=61 because the first 3 odd numbers in binary are 1 11 101, and the concatenation 111101 in base 10 = 61. a(4)=495 because the first 4 odd numbers in binary are 1 11 101 111, and the concatenation 111101111 in base 10 = 495. MATHEMATICA Table[FromDigits[Flatten[IntegerDigits[Range[1, 2n+1, 2], 2]], 2], {n, 0, 20}] (* Harvey P. Dale, May 31 2019 *) CROSSREFS Sequence in context: A249556 A135165 A218805 * A218228 A155599 A104093 Adjacent sequences: A164940 A164941 A164942 * A164944 A164945 A164946 KEYWORD base,easy,nonn AUTHOR Gil Broussard, Sep 01 2009 STATUS approved

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Last modified January 29 08:01 EST 2023. Contains 359915 sequences. (Running on oeis4.)