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a(n) = A214938(2n).
4

%I #7 Aug 20 2017 12:39:20

%S 1,1,3,11,46,207,977,4769,23872,121862,631958,3319923,17630692,

%T 94493713,510468519,2776629563,15194389388,83591476528,462062822648,

%U 2564995473974,14293435176216,79927207249606,448358398361618,2522381161938591,14228119729773226

%N a(n) = A214938(2n).

%H Lars Blomberg, <a href="/A291090/b291090.txt">Table of n, a(n) for n = 0..1000</a>

%Y Cf. A214938, A291091.

%K nonn

%O 0,3

%A _N. J. A. Sloane_, Aug 19 2017

%E a(18)-a(24) from _Lars Blomberg_, Aug 20 2017