A247894 Integer part of square root of A010807: a(n) = floor(sqrt(n^19)).

0, 1, 724, 34091, 524288, 4367320, 24685212, 106765608, 379625062, 1162261467, 3162277660, 7820427766, 17874003451, 38235066239, 77306558317, 148890490631, 274877906944, 488950340714, 841567195983, 1406563064942, 2289733608959, 3639848436450, 5662594565481

Offset: 0

Author

Karl V. Keller, Jr., Sep 27 2014

Keywords

• nonn

Comments

a(n) = A000196(A010807(n)). - Reinhard Zumkeller, Sep 29 2014

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..1000 (first 201 terms from Karl V. Keller, Jr.)

Crossrefs

Cf. A010807 (n^19).

Cf. A000196.

Programs

Haskell

a247894 = a000196 . a010807  -- Reinhard Zumkeller, Sep 29 2014

Maple

seq(floor(sqrt(n^19)),n=0..100); # Robert Israel, Sep 28 2014

PARI

a(n) = sqrtint(n^19); \\ Michel Marcus, Sep 28 2014

Formula

a(n) = floor(sqrt(n^19)).