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 A014644 Form array starting with {1,1}; then i-th term in a row gives number of i's in next row; sequence is formed from final term in each row. 5
 1, 2, 2, 3, 5, 11, 38, 272, 6474, 1090483, 4363282578, 2940715000315189, 7930047000157075949085439, 14412592242471457956514645440241289655074, 70636608026754077888330819116433040562582634705380432362008848092 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS FORMULA log a(n) grows like constant times phi^n, phi = Golden ratio (Colin Mallows). a(n) converges to a(n-2)*a(n-1)*phi (within 6 decimals for a[15]) - Johan Claes, Oct 02 2005 Limit n --> infty a(n+2)/a(n+1)/a(n)=1/Phi. - Benoit Cloitre, Oct 13 2005 EXAMPLE a[5]=5 because 5 is the last number of the 5th row of A014643 (1,2,2,3,3,4,4,4,5,5,5) CROSSREFS Cf. A014643, A011784. Sequence in context: A127166 A103596 A005426 * A089541 A065843 A111264 Adjacent sequences:  A014641 A014642 A014643 * A014645 A014646 A014647 KEYWORD nonn,nice AUTHOR EXTENSIONS a(1)..a(11) computed by Colin Mallows. a(12)..a(15) computed by Johan Claes Oct 02 2005 STATUS approved

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Last modified June 19 05:18 EDT 2021. Contains 345125 sequences. (Running on oeis4.)