18649

Appears in sequences

• Expansion of E.g.f. cos(sin(tanh(x))), even powers only.at n=4A009040
• Expansion of exp(sinh(tan(x))).at n=8A009221
• Numbers k such that the continued fraction for sqrt(k) has period 55.at n=23A020394
• Number of partitions of n with equal nonzero number of parts congruent to each of 1 and 3 (mod 5).at n=51A035567
• Consider the Diophantine equation x^3 + y^3 = z^3 - 1 (0 < x < y < z) or 'Fermat near misses'. Arrange solutions by increasing values of z. Sequence gives values of z.at n=19A050787
• Interprimes which are of the form s*prime, s=17.at n=9A075292
• a(n) = (27*n^2 + 9*n + 2)/2.at n=37A093485
• Numerators of terms in series expansion of arcsin(arctan(x)).at n=4A096717
• Smallest nonprime number which if used as initial term for iteration of the A000010[x] function, results in list-to-fixed-point of length=n, or 0 if no such number exists.at n=15A098196
• Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a tee 1,1 1,2 1,3 2,2 in any orientation.at n=9A145926
• Semiprimes which are the sum of three distinct positive cubes in two or more distinct ways.at n=24A180089
• Semiprime centered triangular numbers.at n=40A184481
• Number of 7-element subsets of {1, 2, ..., n} having pairwise coprime elements.at n=21A186983
• Centered 28-gonal numbers.at n=36A195314
• Principal diagonal of the convolution array A213831.at n=16A213832
• Numbers n such that the digit sum of Fibonacci(n) is equal to the digit sum of Lucas(n).at n=38A244923
• a(n) = greatest k such that A155043(k+A262509(n)) < A155043(A262509(n)).at n=45A262909
• Integer c such that (a^3 + b^3 - c^3)^2 = 1 where a,b,c are integers greater than 2.at n=37A281224
• Binomial(n,4) - A290447(n).at n=39A290461
• Expansion of e.g.f. arcsinh(arctanh(x)) (odd powers only).at n=4A296679