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A110329
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Diagonal sums of a number triangle related to the Pell numbers.
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1
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1, 2, 11, 76, 727, 8694, 125221, 2107448, 40577501, 879557050, 21193809151, 561950634852, 16258832340451, 509717865337646, 17211690137010377, 622780718533047664, 24039198822957409081, 985985136339748008498
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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..floor(n/2), (n-k)!*Pell(n-2k+1)/k!}
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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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