A tree (also called a central tree) having a single node that is a graph center. The numbers of centered trees on n = 1, 2, ... nodes are 1, 0, 1, 1, 2, 3, 7, 12, 27, 55, 127, 284, 682, 1618, ... (OEIS A000676).
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Jonathan is doing really well in all of his classes this semester, 5 A’s & 2 B’s (he has a computer essentials class instead of PLC). In his Algebra class that Nathan is helping him with he has an A+.
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