A081954 Triangle read by rows: T(n, k) = 2^(n-k)*3^k, n >= 1, 0 <= k < n.

2, 4, 6, 8, 12, 18, 16, 24, 36, 54, 32, 48, 72, 108, 162, 64, 96, 144, 216, 324, 486, 128, 192, 288, 432, 648, 972, 1458, 256, 384, 576, 864, 1296, 1944, 2916, 4374, 512, 768, 1152, 1728, 2592, 3888, 5832, 8748, 13122, 1024, 1536, 2304, 3456, 5184, 7776

Offset

1,1

Links

Table of n, a(n) for n=1..51.

Example

Triangle begins:
2
4 6
8 12 18
16 24 36 54
32 48 72 108 162
...

Prog

(PARI) tabl(nrows) = {for (n=1, nrows, for (k=0, n-1, print1(2^(n-k)*3^k, ", "); ); print(); ); } \\ Michel Marcus, May 14 2013

Crossrefs

Leading diagonal is given by A025192.

Cf. A025192, A081955, A081956, A002262, A090404.

Sequence in context: A238626 A168657 A240498 * A096903 A352107 A273457

Adjacent sequences: A081951 A081952 A081953 * A081955 A081956 A081957

Keyword

nonn,tabl

Author

Amarnath Murthy, Apr 02 2003

Extensions

Corrected and extended by David Wasserman, Jul 21 2004

Status

approved