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 A025613 Numbers of form 3^i*4^j, with i, j >= 0. 4
 1, 3, 4, 9, 12, 16, 27, 36, 48, 64, 81, 108, 144, 192, 243, 256, 324, 432, 576, 729, 768, 972, 1024, 1296, 1728, 2187, 2304, 2916, 3072, 3888, 4096, 5184, 6561, 6912, 8748, 9216, 11664, 12288, 15552, 16384, 19683, 20736, 26244, 27648, 34992, 36864, 46656 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Subsequence of 3-smooth numbers, cf. A003586. LINKS _Reinhard Zumkeller_, Table of n, a(n) for n = 1..10000 PROG (Haskell) import Data.Set (singleton, deleteFindMin, insert) a025613 n = a025613_list !! (n-1) a025613_list = f \$ singleton 1    where f s = m : (f \$ insert (3*m) \$ insert (4*m) s')              where (m, s') = deleteFindMin s -- Reinhard Zumkeller, Jun 01 2011 CROSSREFS Cf. A191113, A191145, A191126, A191127, A191128, A191129, A191130, A191131. Sequence in context: A112169 A155564 A105137 * A097063 A026476 A002513 Adjacent sequences:  A025610 A025611 A025612 * A025614 A025615 A025616 KEYWORD easy,nonn AUTHOR STATUS approved

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Last modified June 17 23:56 EDT 2013. Contains 226327 sequences.