24603

Appears in sequences

• Numbers having four 6's in base 9.at n=3A043480
• Triangle T(b,k) read by rows, giving numbers of pairs of unequal permutations of all the digits 1, ..., k in base b (k<b) whose ratio is an integer.at n=35A080202
• Steffi sequence; the numbers of pairs of unequal permutations of all the digits 1, ..., b-1 in base b whose ratio is an integer.at n=8A080203
• Numbers k such that A081249(m)/m^2 has a local minimum for m = k.at n=9A081250
• a(n) = 2*a(n-1) + 3*a(n-2), with a(0) = 2 and a(1) = 3.at n=9A135522
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 1, 1), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.at n=9A148990
• Triangle t(n,m,k) = binomial(n, m) - k*(binomial(n, m)*binomial(n+1, m)/(m+1)) + k*Eulerian(n+1, m) with k = 6.at n=30A178347
• Triangle t(n,m,k) = binomial(n, m) - k*(binomial(n, m)*binomial(n+1, m)/(m+1)) + k*Eulerian(n+1, m) with k = 6.at n=33A178347
• a(n+1) = a(n) + floor(a(n)/5) with a(0)=5.at n=49A182306
• Sum of all odd-indexed parts minus the sum of all even-indexed parts of all partitions of n, with the parts written in nondecreasing order.at n=40A194714
• Number of (w,x,y,z) with all terms in {1,...,n} and w < harmonic mean of {x,y,z}.at n=16A212106
• Triangle, read by rows, T(n,k) = k*Sum_{i=0..n-k} C(2*i+2*k,i)*C(n-i-1,k-1)/(i+k) for 1 <= k <= n.at n=49A257488
• Numbers n whose sum of anti-divisors is a permutation of their digits.at n=37A258786
• Rectangular array R by antidiagonals: row n shows the positive integers whose base-3 digits have down-variation n, for n>=0. See Comments.at n=54A297441
• a(n) = a(n-1) + 2*a(n-2) - 2*a(n-3) + 3*a(n-4) - 3*a(n-5), where a(0) = 1, a(1) = 3, a(2) = 6, a(3) = 11, a(4) = 20, a(5) = 33.at n=17A297443
• a(n) = a(n-1) + 9*a(n-2) - 9*a(n-3), where a(0) = 1, a(1) = 3, a(2) = 6, a(3) = 33.at n=9A297444
• Number of 2 X n 0..1 arrays with every element equal to 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=14A302279
• Number of parts in all partitions of n with largest multiplicity nine.at n=31A320379
• a(1) = 24603, a(n) = n*a(n-1) but products that are not in A010784 are first reduced as in A320486 (see comments); continue until zero is reached.at n=0A321148