%I #8 Feb 05 2021 00:34:06
%S 1,3,5,9,13,17,23,29,35,41,49,57,65,73,81,91,101,111,121,131,141,153,
%T 165,177,189,201,213,225,239,253,267,281,295,309,323,337,353,369,385,
%U 401,417,433,449,465,481,499,517,535,553,571,589,607,625,643,661,681,701,721,741,761,781,801
%N a(n) = 2*A006463(n) + 1.
%C Index of start of row n in b-files for triangles (such as A237593, A262045) where the rows have length 2*A003056(n).
%H Hugo Pfoertner, <a href="/A340520/b340520.txt">Table of n, a(n) for n = 1..10000</a>
%Y Cf. A003056, A006463, A237593, A262045.
%K nonn
%O 1,2
%A _N. J. A. Sloane_, Feb 04 2021
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