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Search: id:A062918
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| A062918 |
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Sum of the digit reversals of first n natural numbers. |
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+0
3
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| 1, 3, 6, 10, 15, 21, 28, 36, 45, 46, 57, 78, 109, 150, 201, 262, 333, 414, 505, 507, 519, 541, 573, 615, 667, 729, 801, 883, 975, 978, 991, 1014, 1047, 1090, 1143, 1206, 1279, 1362, 1455, 1459, 1473, 1497, 1531, 1575, 1629, 1693, 1767, 1851, 1945, 1950, 1965
(list; graph; listen)
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OFFSET
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1,2
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LINKS
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Harry J. Smith, Table of n, a(n) for n=1,...,1000
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EXAMPLE
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a(12) = 78 as 1+2+3+4+5+6+7+8+9+R(10)+R(11)+R(12) = 1+2+3+4+5+6+7+8+9+01+11+21 = 78.
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PROGRAM
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(PARI) { a=0; for (n=1, 1000, x=n; r=0; while (x>0, d=x-10*(x\10); x\=10; r=r*10 + d); write("b062918.txt", n, " ", a+=r) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Aug 12 2009]
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CROSSREFS
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Cf. A069792.
Sequence in context: A054632 A109453 A037123 this_sequence A113168 A071817 A033442
Adjacent sequences: A062915 A062916 A062917 this_sequence A062919 A062920 A062921
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KEYWORD
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nonn,base,easy
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jul 02 2001
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EXTENSIONS
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More terms from Larry Reeves (larryr(AT)acm.org), Jul 05 2001
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