22287

Appears in sequences

• Number of alkyls X^{II} C_n H_{2n+1} Y with n carbon atoms.at n=11A000645
• a(n) = n*(11*n^2 - 5)/6.at n=23A004467
• Every suffix prime and no 0 digits in base 9 (written in base 9).at n=45A024784
• Squarefree part of the n-th central binomial coefficient.at n=26A056058
• Composite numbers m that divide A123855(m-1) = Sum_{i=1..m-1} Sum_{j=1..m-1} prime(i)^j.at n=22A123857
• Terms of A123857 that are not powers of 2.at n=9A124238
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2+(x+833)^2 = y^2.at n=33A129010
• Numbers of the form 86+p^2 (where p is a prime).at n=34A138692
• Transform of the finite sequence (1, 0, -1, 0, 1) by the T_{1,0} transformation (see link).at n=12A159337
• Numerators in expansion of (1-x)^(3/2).at n=14A161200
• Denominator of Integral_{x=0..+oo} Polylog(-n, -x)^2 for n > 0, with a(0) = 1.at n=13A181131
• The denominators of the subdiagonal in the difference table of the Bernoulli numbers.at n=13A190339
• Least k with precisely n partitions k = x + y satisfying sigma(k) = sigma(x) + sigma(y).at n=17A211224
• Number of (w,x,y,z) with all terms in {1,...,n} and w<x>=y<=z.at n=18A212415
• Primonacci numbers: composite numbers that appear in the Fibonacci-like sequence generated by their own prime factors.at n=8A212875
• Numbers n such that A234519(n) = n.at n=47A234524
• Numbers k such that 3*R_k + 40 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=18A256606
• a(n) = (12*n)!*(3*n)!/((8*n)!*(6*n)!*n!).at n=2A295434
• Denominators of the sequence of rational numbers Rn+ related to Bernoulli numbers.at n=13A308402
• Numerator of harmonic mean of 3 consecutive primes. Denominators are A331260.at n=6A331259