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A128496
Row sums of unsigned triangle |
A128495
|=|S(2;n,m)| (sums of squares of Chebyshev's S-polynomials).
1
1, 2, 4, 9, 20, 50, 125, 324, 840, 2195, 5736, 15012, 39289, 102854, 269260, 704925, 1845500, 4831574, 12649205, 33116040, 86698896, 226980647, 594243024, 1555748424, 4073002225, 10663258250, 27916772500, 73087059249, 191344405220
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OFFSET
0,2
LINKS
Table of n, a(n) for n=0..28.
FORMULA
a(n)=sum(|
A128495
(n,m)|,m=0..n).
CROSSREFS
Cf.
A004523
(looks like signed row sums).
Sequence in context:
A068051
A032289
A006648
*
A134955
A171887
A027881
Adjacent sequences:
A128493
A128494
A128495
*
A128497
A128498
A128499
KEYWORD
nonn
,
easy
AUTHOR
Wolfdieter Lang
, Apr 04 2007
STATUS
approved
