-228

Appears in sequences

• Expansion of sinh(x)*sin(sin(x))/2.at n=4A024227
• Expansion of tanh(tan(x))*sin(x)/2.at n=4A024231
• Discriminants of quadratic number fields Q(sqrt -n) for n squarefree.at n=34A033197
• a(n) = floor(Sum_{k=0..n} tan(k)).at n=29A051508
• a(n) = floor(Sum_{k=0..n} tan(k)).at n=27A051508
• a(n) = floor(Sum_{k=0..n} tan(k)).at n=14A051508
• a(n) = round(Sum_{k=0..n} tan(k)).at n=16A051509
• a(n) = round(Sum_{k=0..n} tan(k)).at n=14A051509
• a(n) = round(Sum_{k=0..n} tan(k)).at n=27A051509
• a(n) = round(Sum_{k=0..n} tan(k)).at n=28A051509
• a(n) = ceiling(Sum_{k=0..n} tan(k)).at n=15A051510
• a(n) = ceiling(Sum_{k=0..n} tan(k)).at n=28A051510
• a(n) = ceiling(Sum_{k=0..n} tan(k)).at n=16A051510
• n - reversal of base 20 digits of n (written in base 10).at n=54A055967
• n - reversal of base 20 digits of n (written in base 10).at n=33A055967
• McKay-Thompson series of class 14b for Monster.at n=43A058506
• McKay-Thompson series of class 18C for the Monster group.at n=19A058533
• McKay-Thompson series of class 24C for Monster.at n=44A058573
• Coefficients of polynomials ( (1 -x +sqrt(x))^(n+1) - (1 -x -sqrt(x))^(n+1) )/(2*sqrt(x)).at n=47A061177
• A measure of how close the square root of 2 is to rational numbers.at n=42A068515