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A254305 as a simple table

na(n)
14351908
257873415
3375506912
4668843106
53675487170
68957909107
733988604549
8148049420699
9526744119301
102240882621222
119450894004634
1240727286045536
13180410729864614
14828697504037197
153816499302562757
1618039375898446637

[4351908,57873415,375506912,668843106,3675487170,
 8957909107,33988604549,148049420699,526744119301,
 2240882621222,9450894004634,40727286045536,
 180410729864614,828697504037197,3816499302562757,
 18039375898446637]