299880

Appears in sequences

• Convolution of A001147 (double factorial numbers) with itself.at n=7A034430
• Riordan array (1, x*g(x)) where g(x) is g.f. of double factorials A001147.at n=47A111106
• Numbers with prime factorization pqr^2s^2t^3.at n=11A190386
• Primitive 4-abundant numbers: Numbers k such that sigma(k) > 4k (A068404) all of whose proper divisors d are 4-deficient numbers (having sigma(d) < 4d).at n=23A307114
• Triangle read by rows: T(n,k) is the number of linear chord diagrams on 2n vertices with one marked chord such that exactly k of the remaining n-1 chords are excluded by (i.e., are outside and do not contain) the marked chord.at n=35A336601
• Expansion of e.g.f. Product_{k>0} 1/(1 - k^3 * x^k)^(1/k^3).at n=7A356561
• a(n) is the smallest n-gonal pyramidal number with exactly n distinct prime factors.at n=2A358864
• a(n) = the hypergraph Catalan number C_5(n).at n=3A362170
• Array read by antidiagonals: A(n,k) = the hypergraph Catalan number C_k(n), n >= 0, k >= 1.at n=31A369288
• Detour index of the n X n black bishop graph.at n=12A387645
• Primitive terms of A023198: numbers k with the property sigma(k)/k >= 4 that are not divisible by any other number with that property.at n=25A392936