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Search: id:A069511
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| A069511 |
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Numbers in which starting from most significant digit the n-th digit is obtained by adding n to the (n-1)-st digit (the digit to the left of it) and then ignoring the carry. Alternately the n-th digit starting from the most significant digit is the n-th triangular number mod 10. |
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| 1, 13, 136, 1360, 13605, 136051, 1360518, 13605186, 136051865, 1360518655, 13605186556, 136051865568, 1360518655681, 13605186556815, 136051865568150, 1360518655681506, 13605186556815063, 136051865568150631
(list; graph; listen)
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