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A075621
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Group the natural numbers so that the n-th group contains n numbers whose concatenation is divisible by n: (1), (2, 4), (3, 5, 7), (6, 8, 9, 12), (10, 11, 13, 14, 15), (16, 17, 18, 19, 20, 24), ... Sequence gives numbers formed by the concatenation.
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4
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1, 24, 357, 68912, 1011131415, 161718192024, 21222325262733, 2829303132343536, 373839404142434445, 46474849505152535460, 5556575859616263646571, 666768697072737475767780, 787981828384858687888990110, 919293949596979899100101102103112
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OFFSET
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1,2
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LINKS
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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EXTENSIONS
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More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 29 2003
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STATUS
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approved
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