57488

Appears in sequences

• Numbers k such that 25*2^k+1 is prime.at n=26A032362
• Numerators of increasingly better rational approximations to Pi with increasing denominators (3/1, 13/4, 16/5, 19/6, 22/7, 179/57, ...)at n=29A063674
• a(n) = 36*Fibonacci(2*n+1) - 4.at n=8A153981
• Number of (n+1)X5 binary arrays with rows and columns in nondecreasing order and with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one.at n=6A184066
• Number of (n+1)X8 binary arrays with rows and columns in nondecreasing order and with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one.at n=3A184069
• T(n,k)=Number of (n+1)X(k+1) binary arrays with rows and columns in nondecreasing order and with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one.at n=48A184071
• a(n) = exp(-1) * Sum_{k>=0} H_n(k)/k!, where H_n(x) is n-th Hermite polynomial.at n=7A277381
• Number of chiral pairs of color patterns (set partitions) for a row of length n.at n=9A320937