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Table of n, a(n) for n=1..26.
First differences are pairwise sums of A025181.
Pairwise sums of A014532.
Sequence in context: A296330 A304162 A001870 * A001047 A099448 A239618
Adjacent sequences: A025565 A025566 A025567 * A025569 A025570 A025571