A250219 Number of times that n appears in n-th OEIS sequence (A_n), or -1 if n appears infinitely many times.

-1, -1, 8, 0, -1, 4, 0, 1, 0, 2, 0, 0, 0, 1, 0, 1, 0, 0

Offset

1,3

Comments

Does a(19) equal -1? (See A000019.)

Links

Table of n, a(n) for n=1..18.

Index entries for sequences whose definition involves A_n (or An).

Example

From Jianing Song, Sep 05 2018: (Start)
a(3) = 8 since A000003(k) = 3 for k = 11, 19, 23, 27, 31, 43, 67 and 163.
a(6) = 4 since A000006(k) = 6 for k = 12, 13, 14 and 15.
a(10) = 2 since A000010(k) = 10 for k = 11 and 22. (End)

Crossrefs

Cf. A000001, A000002, A000003, A000004, etc.

Sequence in context: A296434 A164790 A362121 * A037448 A011470 A345295

Adjacent sequences: A250216 A250217 A250218 * A250220 A250221 A250222

Keyword

sign,more

Author

Eric Chen, Dec 24 2014

Extensions

a(3) corrected by Jianing Song, Sep 05 2018

Status

approved