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A242960 as a simple table

na(n)
14
25
310
420
540
680
7491531
8983062
91966124
102457655
113932248
124915310
136389903
149339089
159830620
1612288275
1712779806
1818678178
1919169709
2019661240
2124576550
2225559612
2328017267
2431949515
2537356356
2638339418
2739322480
2846695445
2949153100
3051119224
3156034534

[4,5,10,20,40,80,491531,983062,1966124,2457655,
 3932248,4915310,6389903,9339089,9830620,12288275,
 12779806,18678178,19169709,19661240,24576550,
 25559612,28017267,31949515,37356356,38339418,
 39322480,46695445,49153100,51119224,56034534]