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A035798
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Coordination sequence for lattice D*_26 (with edges defined by l_1 norm = 1).
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0
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1, 52, 1352, 23452, 305552, 3191812, 27866072, 209284972, 1381251872, 8143343572, 43450388072, 212064570172, 955155127472, 4000126870436, 15677814054136, 57833980313356, 201820290790976, 669263277244276
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OFFSET
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0,2
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LINKS
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Index entries for linear recurrences with constant coefficients, signature (26, -325, 2600, -14950, 65780, -230230, 657800, -1562275, 3124550, -5311735, 7726160, -9657700, 10400600, -9657700, 7726160, -5311735, 3124550, -1562275, 657800, -230230, 65780, -14950, 2600, -325, 26, -1).
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FORMULA
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a(m)=add(2^k*binomial(n, k)*binomial(m-1, k-1), k=0..n)+2^n*binomial((n+2*m)/2-1, n-1); with n=26.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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