A101564 - cp's OEIS frontend

A101564 a(n) = Sum_{k=0..n} (-1)^A010060(n-k)[(n+1) mod (k+1) = 0]10^k, where [] denotes the Iverson bracket.

n	a(n)
0	1
1	9
2	99
3	991
4	9999
5	100091
6	1000001
7	9999009
8	100000099
9	1000009991
10	10000000001
11	100000099109
12	1000000000001
13	9999999000009
14	100000000010099
15	999999990000991
16	9999999999999999
17	100000000100100091

[1, 9, 99, 991, 9999, 100091, 1000001, 9999009, 100000099, 1000009991, 10000000001, 100000099109, 1000000000001, 9999999000009, 100000000010099, 999999990000991, 9999999999999999, 100000000100100091]

cp's OEIS Frontend

A101564 a(n) = Sum_{k=0..n} (-1)^A010060(n-k)[(n+1) mod (k+1) = 0]10^k, where [] denotes the Iverson bracket.

Table of values

List of values

cp's OEIS Frontend

A101564 a(n) = Sum_{k=0..n} (-1)^A010060(n-k)*[(n+1) mod (k+1) = 0]*10^k, where [] denotes the Iverson bracket.

Table of values

List of values

A101564 a(n) = Sum_{k=0..n} (-1)^A010060(n-k)[(n+1) mod (k+1) = 0]10^k, where [] denotes the Iverson bracket.