24828

Appears in sequences

• Numbers k such that 17*2^k - 1 is prime.at n=29A001774
• Number of equilateral triangles formed out of matches that can be found in a hexagonal chunk of side length n in hexagonal array of matchsticks.at n=19A045949
• Start with n, apply k->2k+1 until reach new record prime; sequence gives number of steps needed.at n=16A051918
• McKay-Thompson series of class 36C for Monster.at n=47A058646
• G.f.: 1/p(x), where p(x) = degree 22 Salem polynomial p(x) = x^22 + x^21 - x^19 - 2*x^18 - 3*x^17 - 3*x^16 - 2*x^15 + 2*x^13 + 4*x^12 + 5*x^11 + 4*x^10 + 2*x^9 - 2*x^7 - 3*x^6 - 3*x^5 - 2*x^4 - x^3 + x + 1.at n=37A143419
• Nimsum of pairs of consecutive Lucas numbers.at n=22A165794
• Nim sum of distinct consecutive pairs of Lucas Numbers.at n=11A165990
• Number of 4-step king's tours on an n X n board summed over all starting positions.at n=9A186863
• Potential magic constants of a 10 X 10 magic square composed of consecutive primes.at n=32A192087
• Number of nondecreasing -n..n vectors of length 3 whose dot product with some nonincreasing -n..n vector equals 3.at n=26A226400
• Expansion of f(-x^3, -x^7) * f(x^4, x^6) / psi(-x)^2 in powers of x where psi(), f(,) are Ramanujan theta functions.at n=28A259393
• a(n) = 324*n^2 - 804*n + 468 (n>=2).at n=8A304619
• Expansion of e.g.f. 1/sqrt(1 - 2*log(1 + x)).at n=7A320343
• a(n) = A359720(3*n+1,2*n) for n >= 0.at n=6A359722