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Search: id:A054683
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| A054683 |
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Numbers n such that sum of digits is even. |
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+0
2
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| 0, 2, 4, 6, 8, 11, 13, 15, 17, 19, 20, 22, 24, 26, 28, 31, 33, 35, 37, 39, 40, 42, 44, 46, 48, 51, 53, 55, 57, 59, 60, 62, 64, 66, 68, 71, 73, 75, 77, 79, 80, 82, 84, 86, 88, 91, 93, 95, 97, 99, 101, 103, 105, 107, 109, 110, 112, 114, 116, 118, 121, 123, 125, 127, 129, 130
(list; graph; listen)
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OFFSET
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1,2
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FORMULA
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a(n) = n * 2 for the first 5 numbers; a(n) = n * 2 + 1 for the second 5 numbers (recurrence)
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EXAMPLE
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0, 2, 4, 6, 8, 11 (2), 13 (4), 15 (6), 17 (8), 19 (10), 20 (2), 21 (3) and so on.
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CROSSREFS
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Cf. A054684.
Sequence in context: A128403 A004401 A051244 this_sequence A022839 A022819 A081527
Adjacent sequences: A054680 A054681 A054682 this_sequence A054684 A054685 A054686
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KEYWORD
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nonn,easy,base
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AUTHOR
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Odimar Fabeny (fabeny(AT)terra.com.br), Apr 19 2000
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EXTENSIONS
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More terms from James A. Sellers (sellersj(AT)math.psu.edu), Apr 19 2000
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