login

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”).

A075531 as a simple table

na(n)
10
20
31
42
53
66
710
818
928
1050
1179
12144
13249
14432
15756

[0,0,1,2,3,6,10,18,28,50,79,144,249,432,756]