OFFSET
0,1
COMMENTS
The denominators are given in A228147.
LINKS
Vincenzo Librandi, Rows n = 0..90, flattened
EXAMPLE
Triangle begins:
-3;
-5, -1;
-9, -5, -3;
-17, -3, -5, -1;
-33, -17, -9, -1, -3;
-65, -11, -17, -3, -5, -1;
-129, -65, -33, -17, -9, -5, -3;
-257, -43, -65, -11, -17, -1, -5, -1;
-513, -257, -129, -13, -33, -17, -9, -1, -3;
-1025, -171, -257, -43, -65, -11, -17, -3, -5, -1; etc.
MATHEMATICA
a[n_, k_] := Numerator[(1 + 2^(n - k + 1))/(1 - 2^(k + 1))]; Table[a[n, k], {n, 0, 10}, {k, 0, n}] // Flatten
PROG
(Magma) [Numerator((1+2^(n-k+1))/(1-2^(k+1))): k in [0..n], n in [0..10]];
CROSSREFS
KEYWORD
sign,tabl
AUTHOR
Vincenzo Librandi, Aug 15 2013
STATUS
approved