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A358665 as a simple table

na(n)
121
2202719
3375341540
4834776217484
51482823362091281
62480146959625512771
73954100866385811897908
86098277513580967335984126
99152733286084921835343938561
1013441847550989968623927296910019
1119393111514791549266474890223886106
1227568262002518118100083519899700564808

[21,202719,375341540,834776217484,
 1482823362091281,2480146959625512771,
 3954100866385811897908,6098277513580967335984126,
 9152733286084921835343938561,
 13441847550989968623927296910019,
 19393111514791549266474890223886106,
 27568262002518118100083519899700564808]