[seqfan] Another way to see the semi-Fibonacci

Eric Angelini Eric.Angelini at kntv.be
Sat Apr 11 19:18:47 CEST 2015


Hello SeqFans,
when a term "t" of U is the sum of the two terms preceeding "t", underline "t".
The non-underlined terms of U rebuild U.

U=
0,1,1,1,2,1,3,2,2,5,1,6,3,9,2,11,5,16,
1,17,6,23,3,26,9,35,2,37,11,48,5,53,
16,69,1,70,17,87,6,93,23,116,3,119,
26,145,9,154,35,189,2,191,37,228,
11,239,48,287,5,292,53,345,16,361,
69,430,1,431,70,501,17,518,87,605...

This is http://oeis.org/A030067 with
two more terms (before the start), 0 and 1.

The underlined terms are:

1,2,3,5,6,9,11,16,17,23,26,35,37,48,
53,69,70,87,93,116,119,145,154,189,
191,228,239,287,292,345,361,430,
431,501,518,605,...
...and that is http://oeis.org/A030068

Best,
É.



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