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 A029638 Numbers in the (1,2)-Pascal triangle A029635 that are different from 1. 3

%I

%S 2,3,2,4,5,2,5,9,7,2,6,14,16,9,2,7,20,30,25,11,2,8,27,50,55,36,13,2,9,

%T 35,77,105,91,49,15,2,10,44,112,182,196,140,64,17,2,11,54,156,294,378,

%U 336,204,81,19,2,12,65,210,450,672,714,540,285,100,21,2,13,77,275,660,1122

%N Numbers in the (1,2)-Pascal triangle A029635 that are different from 1.

%D D. M. Bressoud, Proofs and Confirmations, Camb. Univ. Press, 1999; triangle on page 6, denominators.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/AlternatingSignMatrix.html">Alternating Sign Matrix.</a>

%H D. Zeilberger, <a href="http://www.math.rutgers.edu/~zeilberg/DaveRobbins/guess.html">Dave Robbins's Art of Guessing</a>, Adv. in Appl. Math. 34 (2005), 939-954.

%e Triangle begins:

%e 2,

%e 3,2,

%e 4,5,2,

%e 5,9,7,2,

%e 6,14,16,9,2,

%e 7,20,30,25,11,2,

%e ...

%Y Cf. A048601, A029656.

%K nonn,tabl,frac

%O 1,1