1017900

Appears in sequences

• Alkane (or paraffin) numbers l(10,n).at n=23A018211
• Number of reversible strings with n-1 beads of 2 colors. 7 beads are black. String is not palindromic.at n=22A032094
• Number of n-element subsets of [n+7] having an even sum.at n=23A282083
• a(n) = 3*binomial(4*n,n)/(4*n-1).at n=7A337291
• Expansion of (1/x) * Series_Reversion( x * (1-x-x^4/(1-x)^3) ).at n=12A367415