A178888 Irregular table A035206(n,k)*A096162(n,k), read by rows.

1, 2, 2, 3, 6, 6, 4, 12, 12, 24, 24, 5, 20, 20, 60, 60, 120, 120, 6, 30, 30, 30, 120, 120, 120, 360, 360, 720, 720, 7, 42, 42, 42, 210, 210, 210, 210, 840, 840, 840, 2520, 2520, 5040, 5040, 8, 56, 56, 56, 56, 336, 336, 336, 336, 336, 1680, 1680, 1680, 1680, 1680, 6720, 6720, 6720, 20160, 20160

Offset

1,2

Links

Table of n, a(n) for n=1..64.

Example

A035206 begins 1 2 1 3 6 1 4 12 6 12 1 ...
A096162 begins 1 1 2 1 1 6 1 1 2 2 24 ...
therefore
A178888 begins 1 2 2 3 6 6 4 12 12 24 24 ...
with row sums 1,4,15,76,405,2616,18613,151432,1367649...A178887

Crossrefs

Cf. A035206, A096162, A178887 (row sums).

Sequence in context: A290734 A093919 A179661 * A068424 A298484 A139359

Adjacent sequences: A178885 A178886 A178887 * A178889 A178890 A178891

Keyword

easy,nonn,tabf

Author

Alford Arnold, Jun 21 2010

Status

approved