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 A167017 Column 1 of triangle T=A167015: a(n) = T(n+1,1) = [T^(n+1)](n-1,0) for n>0 with a(0)=1. 4
 1, 1, 3, 14, 105, 1080, 13916, 212634, 3723198, 73047825, 1581256303, 37350588290, 954796686233, 26246234745486, 771853099673490, 24180166328032252, 803996438505301917, 28283254774663359546, 1049653570430645994556 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS In triangle T=A167015, row n of T equals the initial n terms in column 0 of matrix power T^n, reversed and with an appended '1'. LINKS Table of n, a(n) for n=0..18. PROG (PARI) {A167015(n, k)=local(M, N); if(n==k|n==k+1, 1, if(n==k+2, k+2, N=matrix(n, n, r, c, if(r>=c, A167015(r-1, c-1))); M=matrix(n+1, n+1, r, c, if(r>=c, if(r<=n, N[r, c], (N^n)[n-k, 1]))); M[n+1, k+1]))} (PARI) {a(n)=A167015(n+1, 1)} CROSSREFS Cf. A167015, A167016, A167018, A167019. Sequence in context: A084420 A163882 A271213 * A051106 A246731 A349584 Adjacent sequences: A167014 A167015 A167016 * A167018 A167019 A167020 KEYWORD nonn AUTHOR Paul D. Hanna, Oct 27 2009 STATUS approved

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Last modified April 20 09:04 EDT 2024. Contains 371799 sequences. (Running on oeis4.)