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Search: id:A122068
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| A122068 |
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Let M = {{2, 1, 0, 0, 0, 0}, {1, 2, 1, 0, 0, 0}, {0, 1, 2, 1, 0, 0}, {0, 0, 1, 2, 1, 0}, {0, 0, 0, 1, 2, 1}, {0, 0, 0, 0, 1, 2}}; v[1] = {1, 1, 1, 1, 1, 1}; v[n] = M.v[n - 1]; then a(n) =v[n][[1]] |
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| 1, 3, 10, 35, 126, 462, 1715, 6419, 24157, 91238, 345401, 1309574, 4970070, 18874261, 71705865, 272491891, 1035680954, 3936821259, 14965658694, 56893879910, 216295686467, 822315097387, 3126323230541, 11885921055638
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