OFFSET
0,1
FORMULA
Concatenation of blocks (F(k), F(k - 1), ..., F(3), F(2)) beginning with k = 3, where F = A000045 (Fibonacci numbers).
EXAMPLE
reverse(s(0),...,s(6)) = reverse(0,1,0,0,1,0,1) = (1,0,1,0,0,1,0)
first repeats in A003849 at (s(4),...,s(10)), so that a(6) = 4.
MATHEMATICA
s = Flatten[Nest[{#, #[[1]]} &, {0, 1}, 12]]; b[m_, n_] := b[m, n] = Take[s, {m, n}]; t = -1 + Flatten[Table[Select[Range[2, 1600], b[#, n + # - 1] == Reverse[b[1, n]] &, 1], {n, 1, 120}]]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Aug 14 2014
STATUS
approved