A083167 Triangle read by rows in which from the second row onwards the n-th row contains n smallest multiples of (n-1) not included earlier such that the row sum is a multiple of n. Triangle begins with 1.

1, 2, 4, 6, 8, 10, 3, 9, 12, 24, 16, 20, 28, 32, 44, 5, 15, 25, 30, 35, 40, 18, 36, 42, 48, 54, 60, 78, 7, 14, 21, 49, 56, 63, 70, 112, 64, 72, 80, 88, 96, 104, 120, 128, 184, 27, 45, 81, 90, 99, 108, 117, 126, 135, 162, 50, 100, 110, 130, 140, 150, 160, 170, 180, 190, 270

Offset

1,2

Links

Table of n, a(n) for n=1..66.

Example

1
2 4
6 8 10
3 9 12 24
16 20 28 32 44
...

Crossrefs

Cf. A083168, A083169, A083170, A083171, A083172.

Sequence in context: A004521 A103694 A357379 * A338741 A115950 A077127

Adjacent sequences: A083164 A083165 A083166 * A083168 A083169 A083170

Keyword

nonn,tabl

Author

Amarnath Murthy, Apr 26 2003

Extensions

Corrected and extended by David Wasserman, Oct 25 2004

Status

approved