134848

Appears in sequences

• a(n+6) = -a(n+5) + a(n+4) + 3a(n+3) + a(n+2) - a(n+1) - a(n). a(n) = sign(n) if abs(n)<=3.at n=42A001945
• Number of permutations of [n] with four inversions.at n=38A005287
• Sums of 4 distinct powers of 7.at n=30A038483
• Number of reduced words of length n in the Weyl group A_41.at n=4A161662
• Degree of the hyperdeterminant of the cubic format (k+1) X (k+1) X (k+1).at n=6A176097
• a(n) = cpg(n, 3) + cpg(n, 4) + ... + cpg(n, n) where cpg(n, m) is the m-th n-th-order centered polygonal number.at n=30A257051
• Expansion of 1/(1 - x*Product_{k>=1} (1 - x^k)^k).at n=21A299211