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Search: id:A111445
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| A111445 |
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Triangle read by rows: row n contains the first n numbers whose squares end in n^2. |
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+0
5
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| 1, 2, 8, 3, 7, 13, 4, 46, 54, 96, 5, 15, 25, 35, 45, 6, 44, 56, 94, 106, 144, 7, 43, 57, 93, 107, 143, 157, 8, 42, 58, 92, 108, 142, 158, 192, 9, 41, 59, 91, 109, 141, 159, 191, 209, 10, 90, 110, 190, 210, 290, 310, 390, 410, 490, 11, 239, 261, 489, 511, 739, 761, 989
(list; table; graph; listen)
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OFFSET
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1,2
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EXAMPLE
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Triangle begins:
1;
2,8;
3,7,13;
4,46,54,96;
5,15,25,35,45;
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MAPLE
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p:=proc(n) local A, k: A:={}: for k from n to 3000 do if type((k^2-n^2)/10^(nops(convert(n^2, base, 10))), integer)=true then A:=A union {k} else A:=A: fi od: seq(A[j], j=1..n): end: for n from 1 to 11 do p(n) od; # yields sequence in triangular form (Deutsch)
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CROSSREFS
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Sequence in context: A050077 A133840 A081349 this_sequence A076696 A011057 A082236
Adjacent sequences: A111442 A111443 A111444 this_sequence A111446 A111447 A111448
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KEYWORD
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base,nonn,tabl
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 03 2005
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EXTENSIONS
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More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Aug 05 2005
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