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A001685 as a simple table

na(n)
01
12
23
35
413
583
62503
7976253
831601312113
92560404986164794683
10202523113189037952478722304798003
11506227391211661106785411233681995783881012463859772443053

[1,2,3,5,13,83,2503,976253,31601312113,
 2560404986164794683,
 202523113189037952478722304798003,
 50622739121166110678541123368199578388101246385977\
 2443053]