login

A260503 as a simple table

na(n)
01
1-2
2-1
3-5
4-32
5-253
6-2381
7-25912
8-319339
9-4388949
10-66495386
11-1100521327
12-19751191053
13-382062458174
14-7924762051957
15-175478462117633
16-4132047373455024
17-103115456926017761
18-2718766185148876961
19-75529218928863243200
20-2205316818199975235447

[1,-2,-1,-5,-32,-253,-2381,-25912,-319339,
 -4388949,-66495386,-1100521327,-19751191053,
 -382062458174,-7924762051957,-175478462117633,
 -4132047373455024,-103115456926017761,
 -2718766185148876961,-75529218928863243200,
 -2205316818199975235447]