20494
domain: N
Appears in sequences
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 92 ones.at n=10A031860
- Fibonacci iteration starting with (1, a(n)) leads to a "nine digits anagram".at n=33A034587
- Expansion of 1/(1+2*x^2-x^3).at n=26A077965
- Expansion of 1/(1+2*x^2+x^3).at n=26A077967
- Main diagonal of semiprime power sum array.at n=2A123177
- a(n) = 1 + n^4 + n^6 + n^9.at n=2A123657
- Number of nX3 binary arrays with each 1 adjacent to exactly two other 1s.at n=15A183324
- Let s(n,j) be Sum_{i=1..j} (prime(primepi(n) + i) mod n). Numbers n such that there exists j with s(n,j) = n.at n=41A274423
- a(n) = 20*2^n + 14.at n=10A305061
- Expansion of Product_{k>=1} (1 - x^k)^(2*k-1).at n=29A319669
- a(n) = (n-2)*2^(n-1) + n + 2.at n=12A343291