A115295 Partial sums of squares of A115291(n).

1, 17, 66, 130, 194, 258, 322, 386, 450, 514, 578, 642, 706, 770, 834, 898, 962, 1026, 1090, 1154, 1218, 1282, 1346, 1410, 1474, 1538, 1602, 1666, 1730, 1794, 1858, 1922, 1986, 2050, 2114, 2178, 2242, 2306, 2370, 2434, 2498, 2562, 2626, 2690, 2754, 2818

Offset

0,2

Comments

Central coefficients of number triangle A115292.

Links

Table of n, a(n) for n=0..45.

Index entries for linear recurrences with constant coefficients, signature (2,-1).

Formula

a(n)=sum{k=0..n, (sum{j=0..k, C(3, j)})^2}; a(n)=A115292(2n, n).

Mathematica

Join[{1, 17}, Range[66, 7000, 64]] (* Vladimir Joseph Stephan Orlovsky, Jul 12 2011 *)

Crossrefs

Sequence in context: A082614 A044155 A044536 * A065011 A031432 A157474

Adjacent sequences: A115292 A115293 A115294 * A115296 A115297 A115298

Keyword

easy,nonn

Author

Paul Barry, Jan 19 2006

Status

approved