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Table of n, a(n) for n=1..99.
n=27: binomial[27,13]=20058300, its largest square-divisor is 900=30^2 so a(27)=tau=8.
Cf. A001405, A046951, A000005, A000188, A056056-A056060.
Sequence in context: A166288 A249138 A056648 * A029265 A103648 A127309
Adjacent sequences: A056058 A056059 A056060 * A056062 A056063 A056064
Labos Elemer Jul 26 2000