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A212788 Half the number of 0..n arrays of length 9 with second differences nonzero.

%I A212788 #10 Jun 09 2023 22:20:44
%S A212788 55,2385,54793,465336,2780392,12025596,43129809,129984123,351172313,
%T A212788 852813984,1922215028,4035429570,8030912421,15179187087,27570308959,
%U A212788 48164526258,81559118508,133992393064,214705512971,335752649443
%N A212788 Half the number of 0..n arrays of length 9 with second differences nonzero.
%C A212788 Row 7 of A212782.
%H A212788 R. H. Hardin, <a href="/A212788/b212788.txt">Table of n, a(n) for n = 1..210</a>
%e A212788 Some solutions for n=5
%e A212788 ..0....0....0....0....3....0....3....3....0....0....3....0....0....0....0....0
%e A212788 ..0....3....3....3....0....3....0....0....3....0....0....3....0....0....0....3
%e A212788 ..3....3....0....3....0....0....0....3....3....3....3....0....3....3....3....0
%e A212788 ..4....1....2....0....3....1....3....3....1....2....3....4....2....2....3....2
%e A212788 ..1....4....1....4....3....5....3....4....5....4....1....0....0....2....0....0
%e A212788 ..4....0....4....2....1....0....2....3....2....5....2....4....0....0....4....0
%e A212788 ..0....3....5....3....3....2....4....4....2....5....4....5....1....3....4....2
%e A212788 ..4....2....2....5....0....1....1....2....3....0....4....5....0....5....1....3
%e A212788 ..2....2....1....3....0....5....0....2....0....0....5....2....5....1....0....1
%Y A212788 Cf. A212782.
%K A212788 nonn
%O A212788 1,1
%A A212788 _R. H. Hardin_, May 27 2012