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 A146528 a(0) = 4; for n >= 1, a(n) = 2^n + 4. 1
 4, 6, 8, 12, 20, 36, 68, 132, 260, 516, 1028, 2052, 4100, 8196, 16388, 32772, 65540, 131076, 262148, 524292, 1048580, 2097156, 4194308, 8388612, 16777220, 33554436, 67108868, 134217732, 268435460, 536870916, 1073741828 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS This is one of many possible ways to extend the Platonic solids sequence A053016. LINKS Table of n, a(n) for n=0..30. FORMULA a(n)=A140504(n), n>0. [From R. J. Mathar, Nov 05 2008] MATHEMATICA v[n_] := 2*(If[n == 0, 0, 2^(n - 1)] + 2); Table[v[n], {n, 0, 30}] CROSSREFS Cf. A053016, A140504, A342759. Sequence in context: A308875 A323059 A136254 * A345016 A216051 A176777 Adjacent sequences: A146525 A146526 A146527 * A146529 A146530 A146531 KEYWORD nonn AUTHOR Roger L. Bagula, Oct 30 2008 EXTENSIONS Edited by N. J. A. Sloane, Mar 21 2021 STATUS approved

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Last modified May 27 03:56 EDT 2024. Contains 372847 sequences. (Running on oeis4.)