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 A212704 a(n) = 9*n*10^(n-1). 8
 9, 180, 2700, 36000, 450000, 5400000, 63000000, 720000000, 8100000000, 90000000000, 990000000000, 10800000000000, 117000000000000, 1260000000000000, 13500000000000000, 144000000000000000, 1530000000000000000, 16200000000000000000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Main transitions in systems of n particles with spin 9/2. Please, refer to the general explanation in A212697. This particular sequence is obtained for base b=10, corresponding to spin S=(b-1)/2=9/2. Number of 0 needed to write all numbers of n+1 digits. [Bruno Berselli, Jun 30 2014] LINKS Stanislav Sykora, Table of n, a(n) for n = 1..100 Stanislav Sýkora, Magnetic Resonance on OEIS, Stan's NMR Blog (Dec 31, 2014), Retrieved Nov 12, 2019. Index entries for linear recurrences with constant coefficients, signature (20,-100). FORMULA n*(b-1)*b^(n-1). For this sequence, set b=10. G.f. 9*x / (10*x-1)^2 . a(n) = 9*A053541(n). - R. J. Mathar, Oct 15 2013 MATHEMATICA Rest@ CoefficientList[Series[9 x/(10 x - 1)^2, {x, 0, 18}], x] (* or *) Array[9 # 10^(# - 1) &, 18] (* Michael De Vlieger, Nov 18 2019 *) PROG (PARI): mtrans(n, b) = n*(b-1)*b^(n-1); for (n=1, 100, write("b212704.txt", n, " ", mtrans(n, 10))) CROSSREFS Cf. A001787, A212697, A212698, A212699, A212700, A212701, A212702, A212703 (b = 2, 3, 4, 5, 6, 7, 8, 9). Sequence in context: A034221 A034240 A163132 * A231726 A064332 A319798 Adjacent sequences:  A212701 A212702 A212703 * A212705 A212706 A212707 KEYWORD nonn,easy AUTHOR Stanislav Sykora, May 25 2012 STATUS approved

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Last modified October 6 12:35 EDT 2022. Contains 357264 sequences. (Running on oeis4.)