21140
domain: N
Appears in sequences
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite EUO = EU-1 Nan[AlnSi112-nO224] starting with a T7 atom.at n=13A019126
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 0), (-1, 0, 1), (0, -1, 0), (0, 1, 1), (1, 0, -1)}.at n=9A148947
- a(n) = n^3 - n^2 - n.at n=28A152015
- Triangle T(n, k) = Eulerian(n+1, k)*Binomial(n+1, k)/(k+1), read by rows.at n=24A155467
- a(n) = 729*n - 1.at n=28A158395
- Number of (n+1)X(n+1) 0..3 arrays with every 2X3 or 3X2 subblock having exactly two clockwise edge increases.at n=1A206055
- Number of (n+1)X3 0..3 arrays with every 2X3 or 3X2 subblock having exactly two clockwise edge increases.at n=1A206057
- T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X3 or 3X2 subblock having exactly two clockwise edge increases.at n=4A206063
- Binary "cubes"; numbers whose binary representation consists of three consecutive identical blocks.at n=19A297405
- Numerators of the convergents given by treating A391217 as continued fraction coefficients after the leading 0.at n=11A392258