69791931223
domain: N
Appears in sequences
- Least positive integer k such that the fractional part of k*sqrt(5) has its n initial partial quotients all equal to 1.at n=25A004794
- Least positive integer k such that the fractional part of k*sqrt(5) has its n initial partial quotients all equal to 1.at n=26A004794
- a(n) = floor((Fibonacci(2*n+1)+1)/2).at n=27A087953
- Antidiagonal sums of number triangle A086645.at n=27A108479
- Expansion of (1-3*x)/(1-5*x+3*x^2+x^3).at n=18A232970
- a(n) = 3*a(n-1) + 5*a(n-2) + a(n-3), with a(0) = a(1) = 1 and a(2) = 7, a linear recurrence which is a trisection of A005252.at n=18A294262
- Numbers k such that the k-th centered 40-gonal numbers (A195317) is a square.at n=18A351354