22049

Appears in sequences

• Pseudoprimes to base 6.at n=41A005937
• Three-fold exponential convolution of Fibonacci numbers with themselves (divided by 6).at n=9A014337
• Numbers k such that the continued fraction for sqrt(k) has period 69.at n=19A020408
• Numerators of continued fraction convergents to sqrt(689).at n=3A042324
• Number of (binary) bit strings of length n having at least one even length block of 0's followed by an even length block of 1's.at n=16A065497
• Numbers n such that n-1, n and n+1 can be expressed as a sum of 2 squares in at least 2 ways.at n=0A091459
• Expansion of (1 + x) / (5*x^2 - 2*x + 1).at n=12A116483
• a(n) = A118443(n)/(n+1), where A118443 is the row sums of triangle A118441.at n=12A118444
• a(n) = 128*n^2 + 32*n + 1.at n=12A157337
• 128n^2 + 2336n + 10657.at n=3A157433
• Numbers k such that k-1 and k+1 are each the product of exactly 7 primes, counted with multiplicity.at n=4A157487
• Numerator of Euler(n, 7/31).at n=3A157688
• a(n) = 18*n^2 - 1.at n=34A157910
• a(n) = 50*n^2 - 1.at n=20A157919
• Number of reduced words of length n in the Weyl group A_50.at n=3A161695
• Number of -n..n arrays x(0..3) of 4 elements with zero sum, and adjacent elements not both strictly positive and not both strictly negative.at n=23A199899
• Number of (w,x,y,z) with all terms in {0,...,n} and 2w-x=max{w,x,y,z}-min{w,x,y,z}.at n=35A212756
• Number of partitions p of n such that 1 + (1/2)*max(p) is a part of p.at n=47A238625
• Numbers k such that 2*k + 1 divides 2^(k+1) - 1.at n=16A246648
• Composites whose prime factorization in base 12 is an anagram of the number in base 12.at n=10A260055