970000
domain: N
Appears in sequences
- Expansion of 1/sqrt(1 - 20*x - 20*x^2).at n=5A106261
- Numbers k such that k and k^2 use only the digits 0, 2, 4, 7 and 9.at n=54A136907
- Numbers k such that k and k^2 use only the digits 0, 3, 4, 7 and 9.at n=23A136934
- Numbers k such that k and k^2 use only the digits 0, 4, 5, 7 and 9.at n=25A136952
- Numbers k such that k and k^2 use only the digits 0, 4, 6, 7 and 9.at n=36A136955
- Numbers k such that k and k^2 use only the digits 0, 4, 7 and 9.at n=17A136960
- a(n) = 1, 7, A011557*(period 6: repeat 10, 13, 31, 49, 70, 97).at n=31A178508