19611

Appears in sequences

• Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite DAC = Dachiardite Na5[Al5Si19O48].12H2O starting with a T2 atom.at n=13A019103
• [ n(n+1)(n+2)...(n+5) / (n+(n+1)+(n+2)+...+(n+5)) ].at n=8A032771
• Trajectory of 1 under map n->47n+1 if n odd, n->n/2 if n even.at n=12A033979
• Trajectory of 3 under map n -> 47n+1 if n odd, n->n/2 if n even.at n=7A037121
• a(n) is the number of numbers between 1 and 2^m with m-n prime factors (counted with multiplicity), for m sufficiently large.at n=12A052130
• Start of the first run of exactly n consecutive odd composite numbers.at n=24A075067
• Integer part of square root of the reciprocal of a number multiplied by 10 to the power of the integer part of the square root of the number.at n=25A089245
• Number of primes of the form 12k + 5 less than 10^n.at n=5A091162
• Expansion of -x * (21*x^7+65*x^6+77*x^5+39*x^4-17*x^3-38*x^2-11*x-1) / ((x+1) * (x^3+x^2-1) * (x^4+2*x^3+x^2+x-1)).at n=11A122015
• G.f.: 1/(1 - x^2/(1 - x^5/(1 - x^8/(1 - x^11/(1 - x^14/(1 - x^17/(1 -...- x^(3*n-1)/(1 -...)))))))), a continued fraction.at n=50A206738
• Number of length n+4 0..7 arrays with no five consecutive elements with pattern ababa or abbba (possibly a=b) and new values 0..7 introduced in 0..7 order.at n=4A244182
• a(n) is the smallest number k such that the difference between the next prime greater than k and k equals n.at n=49A309877
• Expansion of g.f. Sum_{n>=1} q^n/(1-q^n-q^(2*n)-q^(3*n)).at n=17A368687