-18944domain: ZAppears in sequencestanh(tan(x)*tan(x))=2/2!*x^2+16/4!*x^4+32/6!*x^6-18944/8!*x^8...at n=4A009819Duplicate of A009819.at n=3A012392Determinants of 5 X 5 matrices consisting of 25 consecutive primes.at n=9A118815Expansion of e.g.f. exp( x - Sum_{k>=1} x^(2^k)/2^k ).at n=10A374364