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A075621 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. 4
1, 24, 357, 68912, 1011131415, 161718192024, 21222325262733, 2829303132343536, 373839404142434445, 46474849505152535460, 5556575859616263646571, 666768697072737475767780, 787981828384858687888990110, 919293949596979899100101102103112 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..14.

CROSSREFS

Cf. A075622, A075623, A075624, A075625.

Sequence in context: A288968 A269029 A004325 * A293618 A137499 A122813

Adjacent sequences:  A075618 A075619 A075620 * A075622 A075623 A075624

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Sep 30 2002

EXTENSIONS

More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 29 2003

STATUS

approved

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Last modified April 1 14:52 EDT 2020. Contains 333163 sequences. (Running on oeis4.)