This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A256136 a(n) = 6^A000120(n). 2
 1, 6, 6, 36, 6, 36, 36, 216, 6, 36, 36, 216, 36, 216, 216, 1296, 6, 36, 36, 216, 36, 216, 216, 1296, 36, 216, 216, 1296, 216, 1296, 1296, 7776, 6, 36, 36, 216, 36, 216, 216, 1296, 36, 216, 216, 1296, 216, 1296, 1296, 7776, 36, 216, 216, 1296, 216, 1296, 1296, 7776, 216, 1296, 1296, 7776, 1296, 7776 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Also, a row of the square array A256140. It appears that when A151784 is regarded as a triangle in which the row lengths are the powers of 2, this is what the rows converge to. LINKS FORMULA a(n) = A000400(A000120(n)). - Michel Marcus, Mar 21 2015 G.f.: Product_{k>=0} (1 + 6*x^(2^k)). - Ilya Gutkovskiy, Feb 28 2017 EXAMPLE Also, written as an irregular triangle in which the row lengths are the terms of A011782, the sequence begins: 1; 6; 6, 36; 6, 36, 36, 216; 6, 36, 36, 216, 36, 216, 216, 1296; ... MATHEMATICA 6^# & /@ Nest[Join[#, # + 1] &, {0}, 6] (* Michael De Vlieger, Mar 20 2015, after IWABUCHI Yu(u)ki at a000120 *) PROG (PARI) a(n) = 6^hammingweight(n); \\ Michel Marcus, Mar 21 2015 CROSSREFS Cf. A000120, A001316, A048883, A102376, A116522, A151784, A256135, A256140, A256141. Sequence in context: A015699 A244416 A165827 * A111437 A056464 A056454 Adjacent sequences:  A256133 A256134 A256135 * A256137 A256138 A256139 KEYWORD nonn AUTHOR Omar E. Pol, Mar 19 2015 EXTENSIONS More terms from Michael De Vlieger, Mar 20 2015 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 May 22 18:53 EDT 2019. Contains 323481 sequences. (Running on oeis4.)