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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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 (list; graph; refs; listen; history; text; internal format)
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

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 14 07:43 EDT 2020. Contains 335720 sequences. (Running on oeis4.)