A182779 a(n) = A049019(n) * A118851(n). Irregular table read by rows.

1, 1, 2, 2, 3, 12, 6, 4, 24, 24, 72, 24, 5, 40, 120, 180, 360, 480, 120, 6, 60, 240, 180, 360, 2160, 720, 1440, 4320, 3600, 720, 7, 84, 420, 840, 630, 5040, 3780, 7560, 3360, 30240, 20160, 12600, 50400, 30240, 5040

Offset

0,3

Comments

The sequences have shape A000041 and their respective row sums are A000670, A006906 and A006153.

Links

Table of n, a(n) for n=0..44.

Formula

a(n) = A049019(n) * A118851(n).

Example

For n = 3 the values are (3,12,6) = (1,6,6)*(3,2,1).
Table starts:
1;
1;
2, 2;
3, 12, 6;
4, (24, 24), 72, 24;
5, (40, 120), (180, 360), 480, 120;
6, (60, 240, 180), (360, 2160, 720), (1440, 4320), 3600, 720;
7, (84, 420, 840), (630, 5040, 3780, 7560), (3360, 30240, 20160), (12600, 50400), 30240, 5040;

Crossrefs

Cf. A006153 (related to function composition), A133314 (signed version of A049019).

Sequence in context: A178343 A156136 A134243 * A199673 A377660 A375218

Adjacent sequences: A182776 A182777 A182778 * A182780 A182781 A182782

Keyword

nonn,tabf

Author

Alford Arnold, Dec 01 2010

Extensions

a(0) = 1 prepended by Peter Luschny, May 31 2020

Status

approved