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A249450 as a simple table

na(n)
0-2
1-1
21
36
419
553
6142
7375
8985
92582
106763
1117709
1246366
13121391
14317809
15832038
162178307
175702885
1814930350
1939088167
20102334153
21267914294
22701408731
231836311901
244807526974
2512586269023
2632951280097
2786267571270
28225851433715
29591286729877

[-2,-1,1,6,19,53,142,375,985,2582,6763,17709,
 46366,121391,317809,832038,2178307,5702885,
 14930350,39088167,102334153,267914294,701408731,
 1836311901,4807526974,12586269023,32951280097,
 86267571270,225851433715,591286729877]