43165

Appears in sequences

• a(n)-th star number (A003154) is a square.at n=5A054318
• Numbers k such that 2*5^k + 1 is prime.at n=13A058934
• Numbers n such that sum of primes dividing n (with repetition) is equal to the largest prime factor of n+1.at n=32A071863
• Number of partitions of n such that neither floor(n/2) nor ceiling(n/2) is a part.at n=40A238623
• Number of n X 2 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.at n=31A240756
• Composite numbers k of the form 4u+1 for which the odd part of phi(k) divides k-1.at n=24A339870