The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A038234 Triangle whose (i,j)-th entry is binomial(i,j)*4^(i-j)*4^j. 1
 1, 4, 4, 16, 32, 16, 64, 192, 192, 64, 256, 1024, 1536, 1024, 256, 1024, 5120, 10240, 10240, 5120, 1024, 4096, 24576, 61440, 81920, 61440, 24576, 4096, 16384, 114688, 344064, 573440, 573440, 344064, 114688, 16384, 65536, 524288 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Also the absolute values of the coefficients of the Belyi Polynomial P_(i,i)(x). - R. J. Mathar, Oct 16 2008 LINKS I. Bauer, F. Catanese, F. Grunewald, Chebycheff and Belyi Polynomials, Dessins de'Enfants, Beauville Surfaces and Group Theory, Med. J. Math. vol 3 no 2 (2006) 121-146. [From R. J. Mathar, Oct 16 2008] B. N. Cyvin et al., Isomer enumeration of unbranched catacondensed polygonal systems with pentagons and heptagons, Match, No. 34 (Oct 1996), pp. 109-121. FORMULA G.f.: 1/(1 - 4*x - 4*x*y). - Ilya Gutkovskiy, Apr 21 2017 EXAMPLE 1 ; 4 4 ; 16 32 16 ; 64 192 192 64 ; 256 1024 1536 1024 256 ; 1024 5120 10240 10240 5120 1024 ; 4096 24576 61440 81920 61440 24576 4096 ; 16384 114688 344064 573440 573440 344064 114688 16384 ; 65536 524288 1835008 3670016 4587520 3670016 1835008 524288 65536 ; 262144 2359296 9437184 22020096 33030144 33030144 22020096 9437184 2359296 262144 ; CROSSREFS Sequence in context: A183433 A322039 A158101 * A099462 A218051 A092266 Adjacent sequences: A038231 A038232 A038233 * A038235 A038236 A038237 KEYWORD nonn,tabl,easy AUTHOR STATUS approved

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

Last modified December 4 19:07 EST 2022. Contains 358563 sequences. (Running on oeis4.)