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 A038315 Triangle whose (i,j)-th entry is binomial(i,j)*11^(i-j)*1^j. 3
 1, 11, 1, 121, 22, 1, 1331, 363, 33, 1, 14641, 5324, 726, 44, 1, 161051, 73205, 13310, 1210, 55, 1, 1771561, 966306, 219615, 26620, 1815, 66, 1, 19487171, 12400927, 3382071, 512435, 46585, 2541, 77, 1, 214358881, 155897368, 49603708 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS T(i,j) is the number of i-permutations of 12 objects a,b,c,d,e,f,g,h,i,j,k,l, with repetition allowed, containing j a's. - Zerinvary Lajos, Dec 21 2007 REFERENCES B. N. Cyvin et al., Isomer enumeration of unbranched catacondensed polygonal systems with pentagons and heptagons, Match, No. 34 (Oct 1996), pp. 109-121. LINKS EXAMPLE 1 11, 1 121, 22, 1 1331, 363, 33, 1 14641, 5324, 726, 44, 1 161051, 73205, 13310, 1210, 55, 1 1771561, 966306, 219615, 26620, 1815, 66, 1 19487171, 12400927, 3382071, 512435, 46585, 2541, 77, 1 214358881, 155897368, 49603708, 9018856, 1024870, 74536, 3388, 88, 1 MAPLE for i from 0 to 8 do seq(binomial(i, j)*11^(i-j), j = 0 .. i) od; # Zerinvary Lajos, Dec 21 2007 CROSSREFS Sequence in context: A281523 A282420 A282683 * A218018 A093158 A132098 Adjacent sequences:  A038312 A038313 A038314 * A038316 A038317 A038318 KEYWORD nonn,tabl,easy AUTHOR STATUS approved

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Last modified April 26 08:16 EDT 2019. Contains 322472 sequences. (Running on oeis4.)