20178

Appears in sequences

• Numbers k such that k and 4*k are anagrams.at n=12A023088
• 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, -1, 0), (-1, 1, -1), (-1, 1, 0), (0, 1, 1), (1, -1, 0)}.at n=10A148369
• 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, -1, 1), (-1, 0, 1), (-1, 1, -1), (0, 1, 1), (1, 0, -1)}.at n=10A148370
• Triangle read by rows: T(n,k) is the number of 2-compositions of n having largest entry k (1<=k<=n).at n=37A181338
• a(n) = n*(14*n - 1).at n=38A195024
• Total sum of even parts in the last section of the set of partitions of n.at n=30A206436
• Number of compositions of n such that the smallest part has multiplicity eight.at n=11A241868
• Expansion of (1/x) * Series_Reversion( x * ((1-x)^2 + x^4) ).at n=7A371432