69805

Appears in sequences

• Pentanacci numbers for following initial values: a(0) = 1, a(1) = -1, a(2) = 1, a(3) = -1, a(4) = 1.at n=22A122997
• Numbers k such that k![4] - 128 is prime, where k![4] = A007662(k) = quadruple factorial.at n=45A329176
• Expansion of e.g.f. sin( 2 * (exp(x) - 1) )/2.at n=9A357738