

A144156


Eigentriangle, row sums = A006318


2



1, 1, 1, 3, 1, 2, 11, 3, 2, 6, 45, 11, 6, 6, 22, 197, 45, 22, 18, 22, 90, 903, 197, 90, 66, 66, 90, 394, 4279, 903, 394, 270, 242, 270, 394, 1806
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OFFSET

0,4


COMMENTS

Row sums = A006318. Left border = A001003.
Sum of nth row terms = rightmost term of next row.


LINKS

Table of n, a(n) for n=0..35.


FORMULA

Triangle read by rows, T(n,k) = A001003(nk)*A006318(k).
A001003 = (1, 1, 3, 11, 45, 197, 903,...);
A006318 = (1, 2, 6, 22, 90, 394, 1806,...).


EXAMPLE

First few rows of the triangle =
1;
1, 1;
3, 1, 2;
11, 3, 2, 6;
45, 11, 6, 6, 22;
197, 45, 22, 18, 22, 90;
903, 197, 90, 66, 66, 90, 394;
4279, 903, 394, 270, 242, 270, 394, 1806;
...
Row = (11, 3, 2, 6) = termwise products of (11, 3, 1, 1) and (1, 1, 2, 6) = (11*1, 3*1, 1*2, 1*6).


CROSSREFS

A006318, Cf. A001003
Sequence in context: A185835 A229187 A126226 * A116854 A016567 A180771
Adjacent sequences: A144153 A144154 A144155 * A144157 A144158 A144159


KEYWORD

nonn,tabl


AUTHOR

Gary W. Adamson, Sep 12 2008


STATUS

approved



