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a(n) = A004216(n^2).
Table of n, a(n) for n=1..105.
Sequence in context: A108248 A087104 A069926 * A204553 A214455 A060417
Adjacent sequences: A077426 A077427 A077428 * A077430 A077431 A077432
Reinhard Zumkeller, Nov 05 2002