OFFSET

0,1

COMMENTS

Row sums are:

{2, 6, 18, 54, 162, 486., 1458, 4374., 13122,...}.

Sequence was calculated to the 3^n level by hand.

EXAMPLE

{2},

{3, 3},

{2, 14, 2},

{2, 25, 25, 2},

{2, 36, 86, 36, 2},

{2, 47, 194, 194, 47, 2},

{2, 58, 302, 734, 302, 58, 2},

{2, 69, 410, 1706, 1706, 410, 69, 2},

{2, 80, 518, 3390, 5142, 3390, 518, 80, 2}

MATHEMATICA

(* first column : A064263*)

b = {{2}, {3, 3}, {2, 14, 2}, {2, 25, 25, 2}, {2, 36, 86, 36, 2},

{2, 47, 194, 194, 47, 2}, {2, 58, 302, 734, 302, 58, 2},

{2, 69, 410, 1706, 1706, 410, 69, 2}, {2, 80, 518, 3390, 5142, 3390, 518, 80, 2}}

Flatten[b]

CROSSREFS

KEYWORD

nonn,tabl

AUTHOR

Roger L. Bagula, Dec 23 2008

STATUS

approved