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A027674 as a simple table

na(n)
0-1
11
21
31
41
55
67
713
825
949
1089
11169
12319
13601
141129
152129
164009
177549
1814215
1926773
2050417
2194945
22178801
23336721
24634111
251194161
262248849
274235041
287975441
2915019381
3028284551
3153265565
32100309897
33188903953

[-1,1,1,1,1,5,7,13,25,49,89,169,319,601,1129,2129,
 4009,7549,14215,26773,50417,94945,178801,336721,
 634111,1194161,2248849,4235041,7975441,15019381,
 28284551,53265565,100309897,188903953]