30076

Appears in sequences

• Number of subsets of {1,...,n} containing an arithmetic progression of length 3.at n=15A018788
• Numbers whose trajectory under the Esucarys map ends at the fixed point 247.at n=33A129133
• Triangle T(n,k) = |Re|+|Im| where Re+i*Im is the complex coefficient of [x^k] of the series (1-x)^(n+1) * Sum_{k>=0} ((1+i)*k+i)^n *x^k and i the imaginary unit, row n and column k.at n=38A179086
• Triangle T(n,k) = |Re|+|Im| where Re+i*Im is the complex coefficient of [x^k] of the series (1-x)^(n+1) * Sum_{k>=0} ((1+i)*k+i)^n *x^k and i the imaginary unit, row n and column k.at n=42A179086
• Least m>0 such that prime(n) divides S(m)=A007908(m)=123...m and all numbers obtained by cyclic permutations of its digits; 0 if no such m exists.at n=38A181373
• The number of tilings of the 3 X 4 X n room by 1 X 1 X 3 boxes.at n=6A237355
• Numbers k such that (A276086(k)/s)^s >= k^(s-1) and A276086(k) <= A003415(k), where A003415 is the arithmetic derivative, A276086 is the primorial base exp-function, and s = bigomega(k).at n=30A370128
• a(n) is the maximum integer for which some minimum-length sum equaling a(n) of perfect squares less than n^2 excludes (n-1)^2.at n=34A377084
• Numbers k such that A322582(k) <= A276086(k) <= A348507(k).at n=36A392602