22681

Appears in sequences

• Pseudoprimes to base 21.at n=38A020149
• Pseudoprimes to base 35.at n=40A020163
• Pseudoprimes to base 39.at n=36A020167
• Strong pseudoprimes to base 21.at n=11A020247
• Strong pseudoprimes to base 35.at n=10A020261
• Strong pseudoprimes to base 39.at n=14A020265
• Strong pseudoprimes to base 96.at n=14A020322
• Base 5 digits are, in order, the first n terms of the periodic sequence with initial period 1,2,1.at n=6A037538
• Numbers k such that A048138(k) is a prime and sets a new record for such primes.at n=37A064440
• Smallest integer > 1 which is both n-gonal and centered n-gonal.at n=33A072277
• Number of ways to partition the set of divisors of the n-th abundant number into three subsets such that their sums form an integer triangle.at n=17A091235
• Indices of primes in sequence defined by A(0) = 63, A(n) = 10*A(n-1) + 53 for n > 0.at n=13A101538
• Numbers which are the sum of two positive cubes and divisible by 37.at n=27A102618
• Sieve performed by successive iterations of steps where step m is: keep m terms, remove the next 5 and repeat; as m = 1,2,3,.. the remaining terms form this sequence.at n=10A112563
• Terms of A024670 that are not in A141805.at n=32A141806
• Initial term of a series of exactly n consecutive non-Niven (or Harshad) numbers.at n=29A144378
• a(n) = 70*n^2 + 1.at n=18A158734
• a(n) = n*(n^2 - 4*n + 5)/2.at n=37A162607
• a(n) = n^3 + (1-n)^2.at n=28A168297
• Centered 36-gonal numbers.at n=35A195316