30945

Appears in sequences

• Number of nodes in regular n-gon with all diagonals drawn.at n=31A007569
• Decimal part of a(n)^(1/3) starts with a 'nine digits' anagram.at n=11A034278
• Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1010-1111-0010 pattern in any orientation.at n=11A146627
• Number of nX4 0..2 arrays with every 1 immediately preceded by 0 to the left or above, no 0 immediately preceded by a 0, and every 2 immediately preceded by 0 1 to the left or above.at n=8A203177
• a(n) = 1 + 2*n^2 + 3*n^3 + 4*n^4 +5*n^5 + 6*n^6.at n=4A209264
• Number of alternating permutations on 2n letters that avoid a certain pattern of length 5 (see Lewis, 2012, Appendix, for precise definition).at n=4A217821