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Search: id:A008532
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| A008532 |
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Coordination sequence for 4-dimensional I-centered cubic orthogonal lattice. |
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+0
1
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| 1, 10, 44, 126, 280, 530, 900, 1414, 2096, 2970, 4060, 5390, 6984, 8866, 11060, 13590, 16480, 19754, 23436, 27550, 32120, 37170, 42724, 48806, 55440, 62650, 70460, 78894, 87976, 97730, 108180, 119350, 131264, 143946, 157420, 171710, 186840, 202834, 219716, 237510
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OFFSET
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0,2
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COMMENT
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Let f(x) := x^2+x+1; sequence gives f(f(n+1))-f(f(n)), n >= 0.
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REFERENCES
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M. O'Keeffe, Coordination sequences for lattices, Zeit. f. Krist., 210 (1995), 905-908.
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FORMULA
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4*n^3 + 6*n, n >= 1.
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MAPLE
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[ seq( 4*k^3+6*k, k=0..40) ];
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CROSSREFS
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Adjacent sequences: A008529 A008530 A008531 this_sequence A008533 A008534 A008535
Sequence in context: A003866 A057517 A126964 this_sequence A085582 A058310 A005720
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KEYWORD
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nonn
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AUTHOR
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njas
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