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EXAMPLE
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Non-zero coefficients in row n range from x^(n-1) to x^(2n(n-1)) for n>0.
Triangle begins:
1;
1;
0,1,2,1,1;
0,0,1,3,5,8,10,10,9,7,5,2,1;
0,0,0,1,4,10,21,36,55,78,101,122,138,145,143,134,117,95,72,50,32,18,9,3,1;
0,0,0,0,1,5,16,41,87,164,283,452,679,967,1311,1700,2118,2540,2937,3282,3546,3706,3751,3676,3487,3202,2842,2436,2014,1602,1223,894,622,409,253,145,76,35,14,4,1;
0,0,0,0,0,1,6,23,69,172,378,754,1390,2404,3938,6153,9223,13323,18609,25203,33174,42514,53130,64834,77336,90255,103136,115470,126726,136390,143998,149170,151646,151299,148146,142351,134207,124115,112555,100050,87126,74281,61955,50504,40192,31187,23556,17286,12297,8456,5601,3558,2155,1235,664,330,149,59,20,5,1;
...
EXPLICIT EXPANSION OF G.F.:
1/cos_q(x,q) = 1 + x^2/faq(2,q) + x^4*(q + 2*q^2 + q^3 + q^4)/faq(4,q) +
x^6*(q^2 + 3*q^3 + 5*q^4 + 8*q^5 + 10*q^6 + 10*q^7 + 9*q^8 + 7*q^9 + 5*q^10 + 2*q^11 + q^12)/faq(6,q) +
x^8*(q^3 + 4*q^4 + 10*q^5 + 21*q^6 + 36*q^7 + 55*q^8 + 78*q^9 + 101*q^10 + 122*q^11 + 138*q^12 + 145*q^13 + 143*q^14 + 134*q^15 + 117*q^16 + 95*q^17 + 72*q^18 + 50*q^19 + 32*q^20 + 18*q^21 + 9*q^22 + 3*q^23 + q^24)/faq(8,q) +...
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