26021

Properties

Appears in sequences

• Prime number spiral (clockwise, Northeast spoke).at n=27A054553
• Irregular primes the indices of whose indices are irregular primes of order two.at n=2A090887
• a(1) = 1; then primes associated with A091850.at n=40A091851
• Primes from merging of 5 successive digits in decimal expansion of Catalan's constant.at n=31A104919
• Primes p such that adding their adjacent digits in pairs, the digits of their index pi(p) is obtained, in some order.at n=3A115998
• a(n) = min{k>0: the n-th convergent to e equals m/k! for some m}.at n=17A120355
• Floor(exp(n)/n^3).at n=18A132406
• 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, 0, 0), (0, -1, 0), (1, 1, -1), (1, 1, 1)}.at n=8A149732
• Binary order of n plus number of partitions of n-1.at n=38A163295
• Numbers k such that (536*10^k - 23)/9 is prime.at n=18A294635
• Partial sums of A337281.at n=14A337282
• Primes which, when added to their reversals, produce palindromic primes.at n=39A342681
• a(0) = 2. For n >= 1, a(n) is the least prime p such that a(n-1) + p has n prime factors counted with multiplicity.at n=13A363786
• Numbers k such that gcd(2*k^7+1, 3*k^3+2) > 1.at n=22A369153
• Prime numbersat n=2863