26955

Appears in sequences

• a(n) = Sum_{i=0..floor(n/2)} T(2i,n-2i), array T as in A049735.at n=29A049738
• Solutions y of the Mordell equation y^2 = x^3 - 3a^2 + 1 for a = 0,1,2, ... (solutions x are given by the sequence A000466).at n=15A173202
• Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having k up-down runs (1 <= k <= n).at n=39A186370
• Numbers n such that n^8+8 and n^8-8 are prime.at n=21A239503