A089285 Sum of divisors of floor(Pi*10^n), Pi=3.14...

4, 32, 474, 4550, 38688, 314160, 5890500, 47154384, 627314688, 4227938208, 44474529792, 471238898040, 3384209127992, 31609375538016, 321468276096000, 3397292023738536, 63981878014882800, 314159266666564480

Offset

0,1

Links

Table of n, a(n) for n=0..17.

Formula

a(n) = A000203(A011545(n)).

Example

n=4: floor(Pi*10^4) = 31415 with divisors: {1, 5, 61, 103, 305, 515, 6283, 31415}: a(4) = 1 + 5 + 61 + 103 + 305 + 515 + 6283 + 31415 = 38688.

Crossrefs

Cf. A000203, A011545, A089284, A089286, A089287, A000796.

Sequence in context: A192500 A192486 A037964 * A209197 A086906 A034663

Adjacent sequences: A089282 A089283 A089284 * A089286 A089287 A089288

Keyword

nonn

Author

Reinhard Zumkeller, Oct 30 2003

Status

approved