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!)
 A127543 Triangle T(n,k),0<=k<=n, read by rows given by :[ -1,1,1,1,1,1,1,...] DELTA [1,0,0,0,0,0,0,0,...] where DELTA is the operator defined in A084938. 3
 1, -1, 1, 0, -1, 1, -1, 1, -1, 1, -2, 0, 2, -1, 1, -6, 2, 1, 3, -1, 1, -18, 5, 7, 2, 4, -1, 1, -57, 17, 19, 13, 3, 5, -1, 1, -186, 56, 64, 36, 20, 4, 6, -1, 1, -622, 190, 212, 124, 56, 28, 5, 7, -1, 1, -2120, 654, 722, 416, 198, 79, 37, 6, 8, -1, 1, -7338, 2282, 2494, 1434, 673, 287, 105, 47, 7, 9, -1, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,11 COMMENTS Riordan array (2/(3-sqrt(1-4x)), (1-sqrt(1-4x))/(3-sqrt(1-4x))). - Philippe Deléham, Jan 27 2014 LINKS FORMULA T(n,k)=A065600(n-1,k-1)-A065600(n-1,k). Sum_{k, 0<=k<=n}T(n,k)*x^k = A127053(n), A126985(n), A127016(n), A127017(n), A126987(n), A126986(n), A126982(n), A126984(n), A126983(n), A000007(n), A000108(n), A000984(n), A007854(n), A076035(n), A076036(n), A127628(n), A126694(n), A115970(n) for n= -8,-7,...,8,9 respectively. Sum_{j,j>=0}T(n,j)*A007318(j,k)=A106566(n,k) . Sum_{j,j>=0}T(n,j)*A038207(j,k)=A039599(n,k) . Sum_{j,j>=0}T(n,j)*A027465(j,k)=A116395(n,k). EXAMPLE Triangle begins: 1; -1, 1; 0, -1, 1; -1, 1, -1, 1; -2, 0, 2, -1, 1; -6, 2, 1, 3, -1, 1; -18, 5, 7, 2, 4, -1, 1; -57, 17, 19, 13, 3, 5, -1, 1;... CROSSREFS Sequence in context: A112466 A166348 A294658 * A280830 A068907 A219762 Adjacent sequences:  A127540 A127541 A127542 * A127544 A127545 A127546 KEYWORD sign,tabl AUTHOR Philippe Deléham, Apr 01 2007 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 17 23:03 EDT 2021. Contains 343071 sequences. (Running on oeis4.)