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A075643 Group the natural numbers so that the n-th group contains n numbers one each of a multiple of numbers from 1 to n so that the group sum is a multiple of (n+1): (2), (1, 8), (3, 4, 9), (5, 6, 12, 32), (7, 10, 15, 16, 30), (11, 14, 18, 20, 25, 24), ... Sequence gives initial terms of groups. 5
2, 1, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Is this the same sequence as A076074? - Andrew S. Plewe, Apr 30 2007

LINKS

Table of n, a(n) for n=1..60.

CROSSREFS

Cf. A075644, A075645, A075646, A075647 (gives the list of groups).

Sequence in context: A127201 A225844 A006769 * A076074 A319153 A286390

Adjacent sequences:  A075640 A075641 A075642 * A075644 A075645 A075646

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Sep 30 2002

EXTENSIONS

More terms from David Wasserman, Jan 22 2005

STATUS

approved

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Last modified June 7 01:26 EDT 2020. Contains 334836 sequences. (Running on oeis4.)