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 A147589 Concatenation of 2n-1 digits 1 and n-1 digits 0. 1
 1, 1110, 1111100, 1111111000, 1111111110000, 1111111111100000, 1111111111111000000, 1111111111111110000000, 1111111111111111100000000, 1111111111111111111000000000, 1111111111111111111110000000000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(n) is also A147590(n) written in base 2. LINKS Index entries for linear recurrences with constant coefficients, signature (1010,-10000). FORMULA a(n) = A138118(n)/10. a(n) = {[10^(2*n-1)-1]*10^(n-1)}/9, with n>=1. - Paolo P. Lava, Nov 26 2008 G.f.: x*(100*x+1) / ((10*x-1)*(1000*x-1)). - Colin Barker, Jul 08 2014 EXAMPLE n .......... a(n) 1 ........... 1 2 ......... 1110 3 ....... 1111100 4 ..... 1111111000 5 ... 1111111110000 PROG (PARI) vector(100, n, 10^(-2+n)*(-10+100^n)/9) \\ Colin Barker, Jul 08 2014 (PARI) Vec(x*(100*x+1)/((10*x-1)*(1000*x-1)) + O(x^100)) \\ Colin Barker, Jul 08 2014 CROSSREFS Cf. A138118, A147537, A147590. Sequence in context: A252010 A036105 A036103 * A287283 A277927 A086887 Adjacent sequences:  A147586 A147587 A147588 * A147590 A147591 A147592 KEYWORD easy,nonn,base AUTHOR Omar E. Pol, Nov 08 2008 EXTENSIONS Keyword:base added by Charles R Greathouse IV, Apr 28 2010 STATUS approved

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Last modified June 27 15:36 EDT 2022. Contains 354896 sequences. (Running on oeis4.)