154056domain: NAppears in sequencesCharacter of extremal vertex operator algebra of rank 15.at n=5A028524Expansion of e.g.f. exp(x)*tan(2*x)/2.at n=8A084098Sum of positive even numbers up to n^2.at n=27A235367Sum of the divisors of A000073(n) (tribonacci numbers).at n=19A366783