login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A210308 as a simple table

na(n)
14266246
27657326365
313436313660615
423591932615876019
541416867662718913763
672710583058655511309563
7127648944948853198818703027
8224097463695162713946579883851

[4266246,7657326365,13436313660615,
 23591932615876019,41416867662718913763,
 72710583058655511309563,
 127648944948853198818703027,
 224097463695162713946579883851]