296009domain: NAppears in sequencesa(n) = binomial(n,6)-1.at n=21A124089Numerators of convergents to log_10(Pi).at n=8A219723Expansion of (1/x) * Series_Reversion( x / ((1+x) * (1+x^4)) ).at n=16A369444a(n) is the least positive integer k such that 10^(k/A386725(k)) has at least n correct decimal digits of Pi.at n=11A385570