27223

Appears in sequences

• Number of partitions of n with equal nonzero number of parts congruent to each of 1 and 4 (mod 5).at n=54A035568
• Number of essentially different permutations of the numbers 1 to n such that the sum of adjacent numbers is a square.at n=24A090460
• a(n) = 27225*n^2 - 2*n.at n=0A157814
• Triangle read by rows: T(n,k) is the number of descent sequences of length n with exactly k-1 descents, n>=1, 1<=k<=n.at n=58A225624
• a(n) = 9*n^3/2 - 21*n^2/2 + 8*n - 4.at n=17A232495
• Fixed points of permutations A252022 and A252023.at n=12A252079
• Cube analog to Keith numbers.at n=20A274770
• Numbers that can be written as a^2 + 3*b^2 for some a, b in A155716 and also as c^2 + 6*d^2 for some c, d in A092572.at n=22A380295