43170

Appears in sequences

• Triangle read by rows: T(n,k) is the number of labeled commutative monoids of order n with k idempotents.at n=16A058159
• Numbers n that raised to the powers from 1 to k (with k>=1) are multiple of the sum of their digits (n raised to k+1 must not be a multiple). Case k=9.at n=36A135194
• Triangular array read by rows: row n shows the coefficients of the polynomial u(n) = c(0) + c(1)*x + ... + c(n)*x^(n) which is the denominator of the n-th convergent of the continued fraction [k, k, k, ... ], where k = (x + 1)/(x + 2).at n=48A231775
• Number of partitions of n with difference -4 between the number of odd parts and the number of even parts, both counted without multiplicity.at n=49A242688
• Number of decorated Dyck paths of length n without peaks at level 1 ending at arbitrary levels.at n=17A354539