19930

Appears in sequences

• Number of switching networks with S(n) acting on the domain and GL(3,2) acting on the range.at n=2A000872
• Representation degeneracies for Ramond strings.at n=19A005304
• Numbers k such that the continued fraction for sqrt(k) has period 61.at n=31A020400
• Row 3 of square array defined in A047671.at n=21A047672
• a(n) is the number of integers whose sum of divisors is 6^n.at n=20A048253
• Numbers k such that if k = a*b, then a+b = reversal(k) for some integers a,b > 1.at n=16A161791
• 1/16 the number of (n+1) X 9 0..3 arrays with all 2 X 2 subblocks having the same four values.at n=11A184038
• Number of 0..5 arrays x(0..n+1) of n+2 elements without any two consecutive increases or two consecutive decreases.at n=3A200835
• T(n,k)=Number of 0..k arrays x(0..n+1) of n+2 elements without any two consecutive increases or two consecutive decreases.at n=31A200838
• Number of 0..n arrays x(0..5) of 6 elements without any two consecutive increases or two consecutive decreases.at n=4A200841
• Number of n X 3 0..1 arrays with rows and antidiagonals unimodal and columns nondecreasing.at n=29A224141
• Sum of squares of numbers less than n that do not divide n.at n=39A276984