24036

Appears in sequences

• Numbers k such that k and k+1 are modest (cf. A054986).at n=14A055018
• Number of unlabeled 3-element intersecting families (with distinct sets) of an n-element set.at n=12A055485
• Least m>0 such that prime(n) divides S(m)=A007908(m)=123...m and all numbers obtained by cyclic permutations of its digits; 0 if no such m exists.at n=44A181373
• G.f.: A(x) = (1 + 21*x + 3*x^2 - x^3)/(1-x)^5.at n=11A183066
• Number of (n+1) X 4 0..1 arrays with the number of clockwise edge increases in every 2 X 2 subblock differing from each horizontal or vertical neighbor.at n=14A205188
• Number of nX1 0..1 arrays with exactly floor(nX1/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order.at n=20A222283
• Sum over all partitions of n into distinct parts of the bitwise XOR of the parts.at n=41A306925
• Positive integers that have exactly ten representations of the form 1 + p1 * (1 + p2* ... * (1 + p_j)...), where [p1, ..., p_j] is a (possibly empty) list of distinct primes.at n=32A317400
• a(n) = n! * Sum_{k=1..n} sigma_0(k)/k.at n=6A356297