36943

Properties

Appears in sequences

• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 1), (0, 1, 0), (0, 1, 1), (1, 0, 0)}.at n=8A151040
• Middle of 3 consecutive prime numbers, p1, p2, p3, such that p1*p2*p3*d1*d2 = average of twin prime pairs; d1 (delta) = p2 - p1, d2 (delta) = p3 - p2.at n=25A153410
• Primes p such that (p reversed) +6 is a square.at n=16A167472
• Numbers k such that f(k) > f(m) for all m < k, where f(k) = usigma(usigma(usigma(k)))/usigma(usigma(k)) and usigma(k) is the sum of unitary divisors of k (A034448).at n=7A297364
• Emirps p such that 2*p - reverse(p) is also an emirp.at n=26A358689
• Numbers whose square and cube taken together contain each decimal digit at least twice.at n=32A363909
• Lesser of 2 successive primes (k, k+4) sandwiching 3 consecutive nonsquarefree numbers.at n=24A366352
• Expansion of 1/Product_{k>=1} (1 - x^k)^(valuation(k,4) + 1).at n=35A373295
• Prime numbersat n=3919