22506

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 50.at n=5A031728
• Number of 2n-bead balanced binary strings of fundamental period 2n, rotationally equivalent to reversed complement.at n=11A045664
• Triangle of numbers related to Eulerian numbers.at n=31A046803
• Numbers k such that the sum of the Carmichael lambda functions of the divisors is a proper divisor of k.at n=17A131492
• Numbers k such that k and k^2 use only the digits 0, 2, 3, 5 and 6.at n=42A136888
• Expansion of x/((1 - x - x^4)*(1 - x)^7).at n=11A145136
• a(n) = 36*n^2 + 6.at n=24A158479
• Number of lower triangles of an n X n 0..3 array with all row sums equal to the length of the row and all column sums equal to the length of the column.at n=5A195639
• T(n,k) is the number of lower triangles of an n X n 0..k array with all row sums equal to the length of the row and all column sums equal to the length of the column.at n=33A195644
• Multiples of 682.at n=33A200860
• Number of 0..3 arrays of length n+3 with sum less than 6 in any length 4 subsequence (=less than 50% duty cycle).at n=5A213458
• T(n,k)=Number of 0..3 arrays of length n+2*k-1 with sum less than 3*k in any length 2k subsequence (=less than 50% duty cycle).at n=26A213464
• Number of 0..3 arrays of length 2*n+5 with sum less than 3*n in any length 2n subsequence (=less than 50% duty cycle).at n=1A213470
• Rectangular array: (row n) = b**c, where b(h) = h, c(h) = binomial(2*n-4+2*h,n-2+h), n>=1, h>=1, and ** = convolution.at n=42A213853
• E.g.f.: A(x) = Sum_{n>=0} 1/n! * Product_{k=1..n} -log(1 - sin(k*x)).at n=6A223897
• Number of (n+1)X(1+1) 0..3 arrays colored with the difference of the upper median and the minimum in each 2X2 subblock.at n=2A236083
• Number of (n+1)X(3+1) 0..3 arrays colored with the difference of the upper median and the minimum in each 2X2 subblock.at n=0A236085
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays colored with the difference of the upper median and the minimum in each 2X2 subblock.at n=3A236087
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays colored with the difference of the upper median and the minimum in each 2X2 subblock.at n=5A236087
• Sum of divisors of the minimal numbers (A007416).at n=34A256259