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 A126469 Row sums of triangle A126465. 4
 1, 2, 5, 41, 972, 44457, 3271312, 352087787, 52098230423, 10141977387056, 2513121624034518, 772525844883337679, 288558785171538716889, 128760943237115947732171, 67665205307818875323789155 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS PROG (PARI) {a(n)=local(M=matrix(n+1, n+1, r, c, if(r>=c, binomial((r-1)*r*(r+1)/3!-(c-1)*c*(c+1)/3!, r-c))), N=matrix(n+1, n+1, r, c, if(r>=c, binomial((r-1)*r*(r+1)/3!-(c-1)*c*(c+1)/3!+1, r-c)))); sum(k=0, n, (N*M^-1)[n+1, k+1])} CROSSREFS Cf. A126465, A126466, A126467, A126468. Sequence in context: A009457 A175172 A218057 * A054859 A076725 A059917 Adjacent sequences:  A126466 A126467 A126468 * A126470 A126471 A126472 KEYWORD nonn AUTHOR Paul D. Hanna, Dec 27 2006 STATUS approved

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Last modified May 16 19:38 EDT 2021. Contains 343951 sequences. (Running on oeis4.)