18648

Appears in sequences

• Number of partitions of n into parts not of the form 11k, 11k+4 or 11k-4. Also number of partitions with at most 3 parts of size 1 and differences between parts at distance 4 are greater than 1.at n=43A035947
• Numbers k such that sigma (x) = k has exactly 12 solutions.at n=21A060676
• Numbers which are sums of two and also sums of three positive cubes.at n=35A085336
• Numbers which are sums of two, three and four cubes.at n=23A085337
• Numbers which are sums of two, three, four and also sums of five cubes.at n=22A085338
• Resultant of the polynomial x^3-1 and the Chebyshev polynomial of the second kind U_n(x).at n=4A085433
• a(n) = n*(n+1)*(n+2)*(n+4)*(n+23)/120.at n=13A101855
• Numbers which are the sum of two positive cubes and divisible by 37.at n=22A102618
• E.g.f.: 3x/(-1+1/(-1+1/(-1+log(1+3x)))) = -3x[2-log(1+3x)]/[3-2log(1+x)].at n=7A109590
• Number of (directed) Hamiltonian paths in the n-Möbius ladder graph.at n=18A137883
• Row sums of triangle A144825.at n=41A144826
• a(n) = n^3 + (n+2)^3.at n=20A153976
• Number of n-colorings of the Folkman Graph.at n=3A158344
• Number of full arrangements of pseudolines of order n.at n=4A191940
• a(n) = Sum_{i=0..n} digsum_7(i)^3, where digsum_7(i) = A053828(i).at n=59A231678
• Numbers m such that the result of prepending a zero digit to m, removing the least significant digit D, and prepending D, is divisible by m.at n=36A256005
• Numbers that are products of two triangular numbers in more than one way.at n=35A264961
• Numbers k such that 89*10^k - 9 is prime.at n=22A287685
• Number of closed meanders with 2n crossings and 5 digons.at n=14A300901
• Heinz number of the multiset of differences between consecutive divisors of n.at n=23A328023