20931

Appears in sequences

• Terminating decimals of length n of form p/5^q using at most one of each nonzero digit.at n=21A027905
• Indices of primes in sequence defined by A(0) = 17, A(n) = 10*A(n-1) - 33 for n > 0.at n=18A102013
• E.g.f. satisfies: A(x) = exp(x*A(((x+1)^8-1)/8)).at n=5A143639
• Number of (w,x,y) with all terms in {0,...,n} and |w-x| + |x-y| + |y-w| < w+x+y.at n=30A213488
• Number of partitions of n where the difference between consecutive parts is at most 6.at n=39A238866
• Expansion of 1/(1-x*sqrt(4*x^2+1)-2*x^2).at n=13A249512
• Partial sums of A253086.at n=58A255150
• Magic sums of 3 X 3 semimagic squares composed of odd squares.at n=6A269297
• Centered pentagonal numbers which are squarefree semiprimes.at n=32A381043
• Centered pentagonal numbers which are semiprimes.at n=32A382132