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 A134285 Triangle of numbers obtained from the partition array A134284. 5
 1, 3, 1, 10, 3, 1, 35, 19, 3, 1, 126, 65, 19, 3, 1, 462, 331, 92, 19, 3, 1, 1716, 1190, 421, 92, 19, 3, 1, 6435, 5587, 1805, 502, 92, 19, 3, 1, 24310, 20613, 8771, 2075, 502, 92, 19, 3, 1, 92378, 92821, 35726, 10616, 2318, 502, 92, 19, 3, 1, 352716, 347930, 160205 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS This triangle is called s2(3)'. LINKS Wolfdieter Lang, First 10 rows and more. FORMULA a(n,m) = sum(product(s2(3;j,1)^e(n,m,q,j),j=1..n),k=1..p(n,m)) if n>=m>=1, else 0. Here p(n,m)=A008284(n,m), the number of m parts partitions of n and e(n,m,q,j) is the exponent of j in the q-th m part partition of n. s2(3;n,1) = A035324(n,1) = A001700(n-1) = binomial(2*n-1,n). Row sums = A001700. Triangle A134285 = A001263 * A000012. - Gary W. Adamson, Nov 19 2007 EXAMPLE Triangle starts: 1 3, 1 10, 3, 1 35, 19, 3, 1 126, 65, 19, 3, 1 ... a(4,2)=19 because the m=2 parts partitions (1^1,3^1) and (2^2) of n=4 lead to 1^1*10^1 + 3^2 =19, since A001700(n-1)=[1,3,10,...], n>=1. CROSSREFS Row sums A134826. Alternating row sums A134827. Cf. A001700. Sequence in context: A257254 A126953 A134284 * A141811 A291538 A280787 Adjacent sequences:  A134282 A134283 A134284 * A134286 A134287 A134288 KEYWORD nonn,easy,tabl AUTHOR Wolfdieter Lang, Nov 13 2007 STATUS approved

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Last modified March 29 17:23 EDT 2020. Contains 333116 sequences. (Running on oeis4.)