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a(n) is the coefficient of 1/n in the base n representation of sqrt(n); namely, the digit after the 'decimal' point. - Jason Kimberley, Feb 2012

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Jason Kimberley, Index of expansions of sqrt(d) in base b

a(n) = A000093(n) - n * A000196(n).

Cf. A000196 [the digit before the 'decimal' point in the base n representation of sqrt(n)], A000093.

Sequence in context: A059347 A071496 A071502 * A025247 A127767 A292577

Adjacent sequences: A074701 A074702 A074703 * A074705 A074706 A074707

nonn,look

Reinhard Zumkeller, Sep 03 2002

approved