login

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

A012219 as a simple table

na(n)
01
1-1
217
3-617
444417
5-5210129
6909126033
7-220910314809
871341157623169
9-29556627270426145
1015282372258542389905
11-9645984260739983339273
127298836347461102485422593
13-6521512480584315170326457393

[1,-1,17,-617,44417,-5210129,909126033,
 -220910314809,71341157623169,-29556627270426145,
 15282372258542389905,-9645984260739983339273,
 7298836347461102485422593,
 -6521512480584315170326457393]