A343676 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A343676 as a simple table

n	a(n)
1	4
2	9
3	23
4	49
5	175
6	321
7	1189
8	3025
9	12111
10	28492
11	113409
12	251513
13	1068440
14	2629980
15	11690210
16	28498852
17	128871588
18	298890814
19	1309837146

[4,9,23,49,175,321,1189,3025,12111,28492,113409, 251513,1068440,2629980,11690210,28498852, 128871588,298890814,1309837146]