36008
domain: N
Appears in sequences
- Gaps of 8 in sequence A038593 (lower terms).at n=20A038655
- G.f.: Product_{m>=1} 1/(1-x^m)^A018819(m).at n=19A089292
- a(n) is the number of 5 element sets of distinct integer-sided trapezoids whose base angles are 60 degrees that fill an equilateral triangular grid of side n units, where one trapezoid has a larger base of n units.at n=30A391453