181441

Appears in sequences

• Numbers m such that the factorizations of m..m+5 have the same number of primes (including multiplicities).at n=16A045942
• a(n) = (n!+2)/2.at n=7A139149
• E.g.f.: Sum_{n>=0} x^n * (1 + x^n)^n / n!.at n=9A259208
• Solution of the complementary equation a(n) = a(n-1)*b(n-2) - n, where a(0) = 1, a(1) = 3, b(0) = 2, b(1) = 4.at n=8A294384
• Number of (not necessarily maximal) cliques in the n-alternating group graph.at n=6A308599
• Numbers k such that k, k+1, ..., k+5 all have 3 prime factors (counted with multiplicity).at n=16A375239