18079

Appears in sequences

• Offsets for the Atkin Partition Congruence theorem.at n=45A036492
• Integers i > 1 for which there is no prime p such that i is a solution mod p of x^4 = 2.at n=32A065903
• Numbers k such that h(k) = h(k-1) + h(k-2), where h(k) = A006577(k) + 1 is the length of the sequence {k, f(k), f(f(k)), ...., 1} in the Collatz (or 3x + 1) problem. (The earliest "1" is meant.)at n=28A078418
• Numbers n such that h(n) = 2 h(n-1) where h(n) is the length of the sequence {n, f(n), f(f(n)), ...., 1} in the Collatz (or 3x + 1) problem. (The earliest "1" is meant.)at n=30A078419
• Numbers in ascending order formed by using all the digits of the next n numbers.at n=21A081991
• List of different composites in Pascal-like triangles with index of asymmetry y = 2 and index of obliquity z = 0 or z = 1.at n=39A141066
• 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, 0, 0), (1, -1, 0), (1, 0, 1), (1, 1, -1), (1, 1, 1)}.at n=7A150999
• Semiprimes generated by the polynomial 2 * n^2 + 29.at n=22A241554
• Number of partitions p of n such that 2*(number of even numbers in p) > (number of odd numbers in p).at n=38A241655
• Composites whose prime factorization in base 4 is an anagram of the number in base 4.at n=36A260048
• a(n) = (prime(1+n)*prime(n)) + prime(n) + 1.at n=31A286624
• Number of partitions of the n-th tetrahedral number into distinct tetrahedral numbers.at n=38A298857
• Counterexamples to a conjecture of Ramanujan about congruences related to the partition function.at n=30A340757
• Composite numbers of the form 2*k^2 + 29.at n=22A352949
• Number of maximal sets of pairs (t,d) where 2 <= t <= n, d is a proper divisor of t, no t is repeated, and no d is repeated.at n=20A368349