1,1
A023537(n) + 2n.
Sequence in context: A005581 A064468 A074470 this_sequence A130869 A023612 A132738
Adjacent sequences: A023547 A023548 A023549 this_sequence A023551 A023552 A023553
nonn
Clark Kimberling (ck6(AT)evansville.edu)
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