This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A005594 States of a dynamic storage system. (Formerly M1080) 3
 1, 2, 4, 7, 14, 26, 59, 122, 284, 647, 1528, 3602, 8679, 20882, 50824, 124055, 304574, 750122, 1855099, 4600202, 11442086, 28527447, 71292604, 178526882, 447919419, 1125750146, 2833906684, 7144450567, 18036423974 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 REFERENCES N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). LINKS C. G. Bower, Transforms INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 107 INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 111 M. D. McIlroy, The number of states of a dynamic storage system, Computer J., 25 (No. 3, 1982), 388-392. M. D. McIlroy, The number of states of a dynamic storage system, Computer J., 25 (No. 3, 1982), 388-392. (Annotated scanned copy) FORMULA Also "CIK" (necklace, indistinct, unlabeled) transform of 2, 1, 1, 1, ... MATHEMATICA nmax = 30; f[x_] = Sum[n*x^n, {n, 1, nmax}]; gf = Sum[(EulerPhi[n]/n)*Log[1/(1 - f[x^n])] + O[x]^nmax, {n, 1, nmax}]; CoefficientList[gf, x] + 1 (* Jean-François Alcover, Jul 29 2018, after Joerg Arndt *) CROSSREFS Equals A032198(n)+1. Sequence in context: A238859 A224960 A217933 * A123196 A079968 A280194 Adjacent sequences:  A005591 A005592 A005593 * A005595 A005596 A005597 KEYWORD nonn AUTHOR EXTENSIONS Sequence extended by Christian G. Bower STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified October 14 14:45 EDT 2019. Contains 328019 sequences. (Running on oeis4.)