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Triangle whose (i,j)-th entry is binomial(i,j)*7^(i-j)*6^j.
0

%I #5 Mar 30 2012 16:47:46

%S 1,7,6,49,84,36,343,882,756,216,2401,8232,10584,6048,1296,16807,72030,

%T 123480,105840,45360,7776,117649,605052,1296540,1481760,952560,326592,

%U 46656,823543,4941258,12706092,18151560,15558480,8001504

%N Triangle whose (i,j)-th entry is binomial(i,j)*7^(i-j)*6^j.

%D B. N. Cyvin et al., Isomer enumeration of unbranched catacondensed polygonal systems with pentagons and heptagons, Match, No. 34 (Oct 1996), pp. 109-121.

%K nonn,tabl,easy

%O 0,2

%A _N. J. A. Sloane_.