A139331 Triangle read by rows: ConvOffsStoT transform of A103505.

1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 6, 12, 6, 1, 1, 12, 72, 72, 12, 1, 1, 20, 240, 720, 240, 20, 1, 1, 30, 600, 3600, 3600, 600, 30, 1, 1, 56, 1680, 16800, 33600, 16800, 1680, 56, 1, 1, 72, 4032, 60480, 201600, 201600, 60480, 4032, 72, 1

Offset

0,8

Links

Table of n, a(n) for n=0..54.

Example

First few rows of the triangle are:
1;
1, 1;
1, 1, 1;
1, 2, 2, 1;
1, 6, 12, 6, 1;
1, 12, 72, 72, 12, 1;
1, 20, 240, 720, 240, 20, 1;
1, 30, 600, 3600, 3600, 600, 30, 1;
...
Row 4 = (1, 6, 12, 6, 1) since ConvOffs transform of (1, 1, 2, 6) = (1, 6, 12, 6, 1); where A103505 = (1, 1, 2, 6, 12, 20, 30, 56, 72,...).

Crossrefs

Cf. A103505.

Sequence in context: A176224 A174640 A138169 * A173886 A090441 A340591

Adjacent sequences: A139328 A139329 A139330 * A139332 A139333 A139334

Keyword

nonn,tabl

Author

Gary W. Adamson and Roger L. Bagula, Apr 13 2008

Status

approved