login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

A277212 as a simple table

na(n)
01
15
220
365
4190
5505
61260
72970
86700
914535
1030520
1162235
12123720
13240340
14457380
15854190
161568230
172834120
185048140
198871450
2015396690
2126410860
2244811440
2375254240
24125162100
25206275505
26337032360
27546183425
28878270360
291401857550
302221862260

[1,5,20,65,190,505,1260,2970,6700,14535,30520,
 62235,123720,240340,457380,854190,1568230,2834120,
 5048140,8871450,15396690,26410860,44811440,
 75254240,125162100,206275505,337032360,546183425,
 878270360,1401857550,2221862260]