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A107703
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Sums of antidiagonals of number array A103209.
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1
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1, 2, 4, 11, 43, 218, 1336, 9557, 78053, 714578, 7223548, 79704015, 951626175, 12210506762, 167413540912, 2440529176297, 37665520151241, 613124748803618, 10492684074110772, 188241358671950227, 3531254422923432083
(list;
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refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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COMMENTS
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LINKS
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FORMULA
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a(n)=sum{k=0..n, sum{j=0..n-k, C(n-k+j, 2j)*k^j*C(k)}}, C(n) given by A000108.
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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