590790

Appears in sequences

• Square table T(n,k), read by antidiagonals, that satisfies T(n,0)=1, T(n+1,k+1) = sum(i=0,n, sum(j=0,k, T(n-i,k-j)*T(i,j) )), such that the top row and diagonal are equal: T(0,k)=T(k,k)=A088159(k).at n=46A088158
• Numbers k whose sum of divisors equals the sum of divisors of 2*k-1.at n=28A289738
• a(n) = (A022010(n) - 179)/210.at n=20A357889