

A076062


Group the positive integers so that the nth group contains n numbers whose sum is a multiple of the nth prime: (2), (1, 5), (3, 4, 8), (6, 7, 9, 13), (10, 11, 12, 14, 19), (15, 16, 17, 18, 20, 31), ...


4



2, 1, 5, 3, 4, 8, 6, 7, 9, 13, 10, 11, 12, 14, 19, 15, 16, 17, 18, 20, 31, 21, 22, 23, 24, 25, 26, 29, 27, 28, 30, 32, 33, 34, 35, 47, 36, 37, 38, 39, 40, 41, 42, 43, 52, 44, 45, 46, 48, 49, 50, 51, 53, 54, 82, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 87, 65, 66, 67, 68, 69, 70
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OFFSET

1,1


LINKS

Table of n, a(n) for n=1..72.


EXAMPLE

2; 1,5; 3,4,8; 6,7,9,13; 10,11,12,14,19; 15,16,17,18,20,31; ...


CROSSREFS

Cf. A076058, A076059, A076060, A076061.
Sequence in context: A122833 A193692 A075303 * A295563 A132582 A262211
Adjacent sequences: A076059 A076060 A076061 * A076063 A076064 A076065


KEYWORD

nonn,tabl


AUTHOR

Amarnath Murthy, Oct 05 2002


EXTENSIONS

Corrected and extended by Sascha Kurz, Jan 20 2003


STATUS

approved



