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”).

A207424 as a simple table

na(n)
125
2625
35625
447089
5444889
63892729
732936121
8283215241
92427040225
1020642505625
11175841842225
121499143116025
1312764120981481
14108666218127481
15925439613839521
167880177347151769
1767093251777369801
18571284105880558225

[25,625,5625,47089,444889,3892729,32936121,
 283215241,2427040225,20642505625,175841842225,
 1499143116025,12764120981481,108666218127481,
 925439613839521,7880177347151769,
 67093251777369801,571284105880558225]