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%I #9 Jan 03 2019 03:27:02
%S 1,1,3,18,192,3472,104964,5306272,450215638,64298445920
%N Convolution square root of the Robbins sequence, A005130, starting with offset 1.
%C Terms are not integral beyond what's shown! - _Joerg Arndt_, Jan 02 2019
%e Self-convolution = the Robbins sequence, A005130: (1, 2, 7, 42, 429, 7436, ...).
%e Example: A005130(4) = 42 = (1, 1, 3, 18) dot (18, 3, 1, 1) = (18 + 3 + 3 + 18).
%e The reversed procedure given (1, 2, 7, 42, ...) for a(4) = 18 = (1/2) * (42 - 2*a(3)) = (1/2) * 36 = 18.
%Y Cf. A005130, A160708.
%K nonn,less
%O 1,3
%A _Gary W. Adamson_, May 24 2009