136365211648
domain: N
Appears in sequences
- Triangle read by rows: T(n, k) = Sum_{i=1..n-k} inverse-q-binomial(n-k-1, i-1) * q-binomial(n-2+i, n-2) for 0 < k < n with initial values T(n, 0) = 0 for n > 0 and T(n, n) = 1 for n >= 0, here q = 2.at n=38A355401
- Lesser member of Carmichael's variant of amicable pair: numbers k < m such that s(k) = m and s(m) = k, where s(k) = A371418(k).at n=25A371419