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 A054135 T(n,1), array T as in A054134. 2
 2, 4, 9, 19, 39, 79, 159, 319, 639, 1279, 2559, 5119, 10239, 20479, 40959, 81919, 163839, 327679, 655359, 1310719, 2621439, 5242879, 10485759, 20971519, 41943039, 83886079, 167772159, 335544319, 671088639, 1342177279 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Index entries for linear recurrences with constant coefficients, signature (3,-2) FORMULA For n>2, a(n) = 10*A000225(n-3)+9 = 10*(2^(n-3)-1)+9 = 10*2^(n-3) - 1 - Gerald McGarvey, Aug 25 2004 a(1)=1, a(n) = Sum_i=1..n-1 a(i) + n for n>1 - Gerald McGarvey, Sep 06 2004 CROSSREFS Identical to A052549 except for initial term. Sequence in context: A265387 A293322 A267157 * A171858 A099568 A018001 Adjacent sequences:  A054132 A054133 A054134 * A054136 A054137 A054138 KEYWORD nonn AUTHOR STATUS approved

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Last modified September 18 07:26 EDT 2020. Contains 337166 sequences. (Running on oeis4.)