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A099236 Sums of antidiagonals of A099233. 1
1, 2, 3, 5, 9, 18, 39, 91, 226, 594, 1643, 4763, 14419, 45444, 148714, 504150, 1766930, 6390720, 23815168, 91306968, 359694457, 1454213026, 6027213531, 25583995337, 111118605583, 493407322280, 2238131105770, 10363617299670, 48954143141361 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..28.

FORMULA

a(n)=sum{j=0..n, sum{k=0..n-j, binomial(j(n-j-k), k)}}

CROSSREFS

Sequence in context: A022862 A292541 A097332 * A234535 A320964 A130581

Adjacent sequences:  A099233 A099234 A099235 * A099237 A099238 A099239

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Oct 08 2004

STATUS

approved

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Last modified May 19 20:41 EDT 2019. Contains 323410 sequences. (Running on oeis4.)