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Search: id:A072433
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| A072433 |
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Numbers n for which there are exactly nine k such that n = k + reverse(k). |
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+0
1
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| 99, 110, 121, 909, 929, 949, 969, 989, 1009, 1010, 1029, 1030, 1049, 1050, 1069, 1070, 1089, 1090, 1110, 1130, 1150, 1170, 1190, 1881, 2101, 3223, 4763, 9009, 10010, 10989, 11990, 16236, 17776, 18081, 18281, 18481, 18681, 18881, 18898
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Subsequence of A067030. First term is A072041(9).
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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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99 = k + reverse(k) for k = 18, 27, 36, 45, 54, 63, 72, 81, 90.
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PROGRAM
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(ARIBAS) var n, k, c, i, rev: integer; st, nst: string; end; m := 9; for n := 0 to 19500 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, A072041.
Sequence in context: A097846 A033419 A110397 this_sequence A133650 A045298 A039446
Adjacent sequences: A072430 A072431 A072432 this_sequence A072434 A072435 A072436
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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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