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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 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

Row sums = A006318. Left border = A001003.

Sum of n-th 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(n-k)*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

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Last modified April 18 18:58 EDT 2014. Contains 240733 sequences.