login

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

A009047 as a simple table

na(n)
01
1-1
2-7
323
41297
5-6129
6-894903
7829671
81879275169
91886150559
10-7580265762535
11-85001467923145
1261409100961369265
131056714909891968687
14-781355567634874555799
15-25440890573992236442361

[1,-1,-7,23,1297,-6129,-894903,829671,1879275169,
 1886150559,-7580265762535,-85001467923145,
 61409100961369265,1056714909891968687,
 -781355567634874555799,-25440890573992236442361]