38913
domain: N
Appears in sequences
- a(n) = 4*a(n-1) + 3*a(n-2) - 14*a(n-3) + 8*a(n-4).at n=9A096977
- Where records appear in A109734.at n=42A109740
- a(n) is the smallest nonnegative x such that the Euler polynomial x^2 + x + 41 has exactly n distinct prime proper divisors.at n=4A145293
- Indices k such that 15 plus the k-th triangular number is a perfect square.at n=21A154145
- a(n) = 38*n^2 + 1.at n=32A158593
- Index of first occurrence of n in A165633.at n=29A165765
- a(n) = n*(n + 1)*(5*n^2 + 5*n - 4)/12.at n=17A264853
- Number of septenary sequences of length n such that no two consecutive terms have distance 2.at n=6A287809
- Number of compositions of n such that the set of parts and the set of multiplicities of parts are equal.at n=21A336031
- a(n) = Sum_{k=0..floor(2*n/7)} binomial(3*k,2*n-7*k).at n=27A392436