The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A140649 Triangle whose rows are decreasing powers of 2, followed by 0. 0
 1, 0, 2, 1, 0, 4, 2, 1, 0, 8, 4, 2, 1, 0, 16, 8, 4, 2, 1, 0, 32, 16, 8, 4, 2, 1, 0, 64, 32, 16, 8, 4, 2, 1, 0, 128, 64, 32, 16, 8, 4, 2, 1, 0, 256, 128, 64, 32, 16, 8, 4, 2, 1, 0, 512, 256, 128, 64, 32, 16, 8, 4, 2, 1, 0, 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 1, 0, 2048, 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 1, 0, 4096 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,3 LINKS FORMULA T(n,k) = 2^(n-k-1) if n>k, otherwise 0. EXAMPLE Triangle begins 1, 0, 2, 1, 0, 4, 2, 1, 0, 8, 4, 2, 1, 0, 16, 8, 4, 2, 1, 0, 32, 16, 8, 4, 2, 1, 0, 64, 32, 16, 8, 4, 2, 1, 0 PROG (PARI) T(n, k) = if(n>k, 2^(n-k-1), 0); for(n=2, 10, for(k=1, n, print1(T(n, k), ", ")); print()); /* show triangle */ CROSSREFS Sequence in context: A261877 A062296 A249343 * A290222 A327549 A293808 Adjacent sequences:  A140646 A140647 A140648 * A140650 A140651 A140652 KEYWORD nonn,easy,tabf AUTHOR Paul Curtz, Jul 09 2008 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 April 7 15:56 EDT 2020. Contains 333306 sequences. (Running on oeis4.)