48283

Appears in sequences

• Strong pseudoprimes to base 11.at n=13A020237
• Number of partitions of n into exactly 7 different parts with distinct multiplicities.at n=23A212118
• Number of n X 6 arrays of the minimum value of corresponding elements and their horizontal or vertical neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..1 n X 6 array.at n=20A219500
• Number of length 4+3 0..n arrays with every four consecutive terms having the sum of some three elements equal to three times the fourth.at n=17A248541
• G.f.: Product_{k>=1} (1+x^k)^(2*k-1).at n=17A255835
• Compound filter: a(n) = P(sigma(n), sigma(2n)), where P(n,k) is sequence A000027 used as a pairing function, and sigma is the sum of divisors (A000203).at n=44A286359
• a(0) = a(1) = 1; a(n+2) = Sum_{k=0..n} (binomial(n,k) mod 2) * a(k).at n=35A331520