A284384 - OEIS

%I #6 Mar 26 2017 11:52:09

%S 0,1,1,2,3,4,6,7,10,11,14,15,18,19,23,24,29,30,35,36,41,42,47,48,53,

%T 54,60,61,68,69,76,77,84,85,92,93,100,101,108,109,116,117,125,126,135,

%U 136,145,146,155,156,165,166,175,176,185,186,195,196,205,206,215,216

%N Alternate A167381(n), A167381(n) + 1.

%C The first differences (a(n+1) - a(n)) are b(n) = 1, 0, 1, 1, 1, 2, 1, 3, 1, 3, 1, 3, 1, 4, 1, 5, 1, 5, 1, 5, 1, 5, 1, 5, 1, 6, 1, 7, 1, 7, ... .

%C b(2n+1) = 0, 1, 2, 3, 3, 3, 4, 5, 5, 5, 5, 5, 6, 7, 7, 7, 7, 7, 7, 7, 8, ... =

%C 0, 1,

%C 2, 3, 3, 3

%C 4, 5, 5, 5, 5, 5,

%C 6, 7, 7, 7, 7, 7, 7, 7,

%C ...

%C = 2*n followed by 2*n+1 times 2*n+1 (by rows) = A282692(n)?

%C = A284359(n) - 1.

%Y Cf. A005408, A167381, A282692, A284359.

%K nonn

%O 0,4

%A _Paul Curtz_, Mar 26 2017