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Search: id:A072427
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| A072427 |
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Numbers n for which there is a unique k such that n = k + reverse(k). |
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+0
1
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| 0, 2, 4, 6, 8, 10, 11, 12, 14, 16, 18, 101, 141, 161, 181, 198, 201, 221, 241, 261, 281, 1001, 1818, 1838, 1858, 1878, 1898, 1918, 1938, 1958, 1978, 1998, 2981, 10001, 10201, 10401, 10601, 10801, 11001, 11201, 11401, 11601, 11801, 18018, 19998
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Subsequence of A067030. First term is A072041(1). A068065 is a subsequence of this sequence.
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LINKS
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Index entries for sequences related to Reverse and Add!
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EXAMPLE
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18 = 9 + 9; 261 = 180 + 081; 11401 = 10700 + 00701.
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PROGRAM
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(ARIBAS) var n, k, c, i, rev: integer; st, nst: string; end; m := 1; for n := 0 to 29000 do k := n div 2; c := 0; while k <= n and c < m + 1 do st := itoa(k); nst := ""; for i := 0 to length(st) - 1 do nst := concat(st[i], nst); end; rev := atoi(nst); if n = k + rev then inc(c); if k mod 10 <> 0 and k <> rev then inc(c); end; end; inc(k); end; if c = m then write(n, ", "); end; end;
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CROSSREFS
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Cf. A067030, A068065, A072041, A072040, A071914.
Sequence in context: A154809 A153170 A067030 this_sequence A050420 A096922 A055954
Adjacent sequences: A072424 A072425 A072426 this_sequence A072428 A072429 A072430
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KEYWORD
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base,nonn
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AUTHOR
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Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Jun 17 2002
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