24850

Appears in sequences

• Atom-rooted polyenoids with n edges with symmetry class C_s.at n=10A000908
• a(n) = ceiling(10000*log(n)).at n=11A004245
• sec(arctanh(x)*exp(x))=1+1/2!*x^2+6/3!*x^3+37/4!*x^4+260/5!*x^5...at n=7A012719
• Denominators of continued fraction convergents to sqrt(745).at n=9A042435
• McKay-Thompson series of class 32B for the Monster group.at n=41A058630
• Average of row n of A082259.at n=27A082262
• a(n) is the least k such that (k*prime(n)#)^2 + 1, ((k+1)*prime(n)#)^2 + 1 and ((k+2)*prime(n)#)^2 + 1 are 3 primes, where prime(n)# is the n-th primorial.at n=24A098765
• Series reversion of x*(1-3*x)/(1-x).at n=6A107841
• Heptagonal numbers divisible by 7.at n=29A117795
• Duplicate of A000908.at n=10A121095
• Series expansion of the elliptic function sqrt(k) = theta_2/theta_3 in powers of q^(1/4).at n=81A127391
• Expansion of the elliptic function sqrt(k(q))/q^(1/4) in powers of q, where sqrt(k(q)) = theta_2(q)/theta_3(q).at n=20A127392
• Heptagonal numbers A000566 which are the sum of two other heptagonal numbers > 0.at n=11A133251
• Sum of first k numbers in column k of the natural number array A000027; by antidiagonals.at n=27A185787
• Number of n X 2 0..3 arrays with rows and columns lexicographically nondecreasing read forwards and nonincreasing read backwards.at n=41A201975
• Triangle read by rows: a non-Riordan array serving as a counterexample to a conjecture about Riordan arrays.at n=21A235608
• a(n) = (n + 1)^2*(5*n^2 + 10*n + 2)/2.at n=9A269237
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 54", based on the 5-celled von Neumann neighborhood.at n=40A270024