

A140589


Triangle A(k,n) = (2)^k+2^n read by rows.


1



2, 1, 0, 5, 6, 8, 7, 6, 4, 0, 17, 18, 20, 24, 32, 31, 30, 28, 24, 16, 0, 65, 66, 68, 72, 80, 96, 128, 127, 126, 124, 120, 112, 96, 64, 0, 257, 258, 260, 264, 272, 288, 320, 384, 512, 511, 510, 508, 504, 496, 480, 448, 384, 256, 0, 1025, 1026, 1028, 1032
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OFFSET

0,1


COMMENTS

The flattened sequence a(A000217(k)+j)=A(k,j) obeys a(n+1)2a(n)= 5, 2, 5, 4, 4, 23, 8, 8, 8, 17, 16, 16, 16, 16, 95, ..., which is a dispersion of 2, 4, 4, 8, 8, 8, ... (a signed version of A140513) with 5, 5, 23, 17, 95, 65,... The latter sequence is A(k,0)2*A(k1,k1), an alternation of the negative of A140529 with each second element of A000051.


LINKS

Table of n, a(n) for n=0..58.
Dana G. Korssjoen, Biyao Li, Stefan Steinerberger, Raghavendra Tripathi, and Ruimin Zhang, Finding structure in sequences of real numbers via graph theory: a problem list, arXiv:2012.04625, Dec 08, 2020


FORMULA

A(k,n) = A000079(n)+A122803(k).


EXAMPLE

Rows starting at k=0: (2), (1,0); (5, 6, 8); (7,6,4,0); (17,18,20,24,32);...


CROSSREFS

Sequence in context: A054651 A292323 A059720 * A331955 A185209 A316659
Adjacent sequences: A140586 A140587 A140588 * A140590 A140591 A140592


KEYWORD

sign,tabl


AUTHOR

Paul Curtz, Jul 06 2008


EXTENSIONS

Edited by R. J. Mathar, Jul 08 2008


STATUS

approved



