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Antidiagonal sums of A086272 (and of A086273).
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%I #5 Mar 30 2012 18:57:05

%S 1,4,12,29,60,111,189,302,459,670,946,1299,1742,2289,2955,3756,4709,

%T 5832,7144,8665,10416,12419,14697,17274,20175,23426,27054,31087,35554,

%U 40485,45911,51864,58377,65484,73220,81621,90724,100567,111189

%N Antidiagonal sums of A086272 (and of A086273).

%F a(n)=n+Sum{(k+1)C(n+1-k, 2): k=1, 2, ..., n}.

%F n(n^3+6n^2-n+18)/24.

%Y Cf. A086272, A086273.

%Y A005582(n-1) + n.

%K nonn

%O 1,2

%A _Clark Kimberling_, Jul 14 2003