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A264877 as a simple table

na(n)
11
249
31101
422152
5356692
64747695
768488297
81050281271
916268725036
10247512489984
113713720283901
1255663627322361
13837518704332088
1412633257316861814
15190523379365155077
162870374015520944177

[1,49,1101,22152,356692,4747695,68488297,
 1050281271,16268725036,247512489984,3713720283901,
 55663627322361,837518704332088,12633257316861814,
 190523379365155077,2870374015520944177]