46409
domain: N
Appears in sequences
- Antidiagonal sums in A101321.at n=32A101338
- "Ceiling of hypotenuses": a(n) = ceiling(sqrt(a(n-1)^2 + a(n-2)^2)), a(1)=1, a(2)=3.at n=40A104805
- a(n) = (4*a(n-1)*a(n-3) + a(n-2)^2)/a(n-4), with a(1)=...=a(4)=1.at n=8A121881
- G.f.: 1/(1-x) = Sum_{n>=0} a(n)*x^n * Product_{k=1..n+1} (1-k*x).at n=6A187806
- Numbers k such that (148*10^k - 1)/3 is prime.at n=25A274331
- a(n) = digsum(2^a(n-1)) with a(0) = 0.at n=33A330822