2,1
Sequence in context: A105787 A110497 A000472 this_sequence A098858 A134449 A103579
Adjacent sequences: A049047 A049048 A049049 this_sequence A049051 A049052 A049053
nonn
David W. Wilson (davidwwilson(AT)comcast.net)
Checked all a(n) <= 423000
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