21785

Appears in sequences

• Expansion of e.g.f. cos(x)/(1+x).at n=8A009102
• Pseudoprimes to base 66.at n=41A020194
• Numbers k such that the continued fraction for sqrt(k) has period 77.at n=27A020416
• Multiplicity of highest weight (or singular) vectors associated with character chi_33 of Monster module.at n=39A034421
• a(n) is the n-th J_8-prime (Josephus_8 prime).at n=9A163788
• Compositions of n into parts 3, 5 and 7.at n=49A245367
• a(n) = (4/n^2)*( Sum_{k=0..n-1} k*A246459(k) ).at n=5A246513
• a(n) = (2*n)!*Sum_{k = 0..n} (-1)^k/(2*k)!.at n=4A275651
• a(n) = n! * Sum_{k=0..floor(n/2)} (-1)^k / (n-2*k)!.at n=8A337749
• a(n) is the row of the Trithoff (tribonacci) array that contains the tails of the sequence which is n times the tribonacci numbers.at n=27A351685
• a(n) is the first position where the digits of n occur simultaneously in the decimal expansions of Pi and e.at n=41A381980