27778
domain: N
Appears in sequences
- Number of positive integers <= 2^n of form 9 x^2 + 9 y^2.at n=20A054193
- Nearest integer to n^6/36.at n=9A061004
- Numbers k such that the digits of k^2 are exactly the same (albeit in different order) as the digits of (k+1)^2.at n=9A072841
- Numbers k such that the concatenation of k with 8*k gives a square.at n=9A115549
- a(n) = A165966(n)/12.at n=25A166119
- Numbers k such that k and k+17 have same sum of divisors.at n=11A172335
- Number of ordered triples (w,x,y) with all terms in {1,...,n} and 2w^3>=x^3+y^3.at n=39A211804
- Principal diagonal of the convolution array A213828.at n=16A213829
- a(n) = Sum_{k=1..n} k * sigma_3(k).at n=9A356126
- Smallest positive number divisible by n that has n letters in US English, or 0 if none exists.at n=40A384131