223345

Appears in sequences

• a(n) = (1/2)*s(n+3), where s = A025251.at n=19A025252
• Diagonal sums of number triangle [k<=n]*C(n,2n-2k)2^(n-k)A000108(n-k).at n=20A160565
• Fermat pseudoprimes to base 2 divisible by 5.at n=20A216023
• Number of n X 5 0..1 arrays with every element unequal to 0, 1 or 2 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=17A317761