929880

Appears in sequences

• E.g.f.: sech(sinh(x)*log(x+1))=1-12/4!*x^4+60/5!*x^5-450/6!*x^6+2940/7!*x^7...at n=10A012518
• a(n) = 4*(3*n+2)*(2*n+1)*(n+2)*(n+1).at n=14A155122
• Number of ways to place 5 nonattacking zebras on an n X n board.at n=6A172140
• Expansion of e.g.f. Product_{k>=0} 1/(1 - x^(2^k)/2^k).at n=9A306947
• Tri-unitary harmonic numbers: numbers k such that the harmonic mean of the tri-unitary divisors of k is an integer.at n=38A335387