23077

Appears in sequences

• Decimal part of a(n)^(1/5) starts with a 'nine digits' anagram.at n=11A034280
• Numbers that reach the fixed point 89 under iteration of f(x) = reverse(x) - maxdigit(x).at n=29A097155
• a(n) = Sum_{k + l*m <= n} (k + l*m), with 0 <= k,l,m <= n.at n=22A106846
• Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 10 ones in any 5 X 5 X 5 subtriangle.at n=9A153991
• Odd composite numbers n, such that n, n+d, n*d and n/d are all odious (A000069) for every divisor d of n.at n=34A231558
• Number of (n+2) X (2+2) 0..1 arrays with no 3 x 3 subblock diagonal sum 0 or 1 and no antidiagonal sum 0 or 1 and no row sum 0 or 1 and no column sum 0 or 1.at n=6A255021
• Number of (n+2)X(7+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 or 1 and no antidiagonal sum 0 or 1 and no row sum 0 or 1 and no column sum 0 or 1.at n=1A255026
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 or 1 and no antidiagonal sum 0 or 1 and no row sum 0 or 1 and no column sum 0 or 1.at n=29A255027
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 or 1 and no antidiagonal sum 0 or 1 and no row sum 0 or 1 and no column sum 0 or 1.at n=34A255027
• a(n) is the number of regions formed by n-secting the angles of a nonagon (enneagon).at n=36A335781
• Numbers m such that numbers m, m + 1, m + 2 and m + 3 have k, 2k, 3k and 4k divisors respectively.at n=11A340157
• Numbers k such that k, k+1, k+2, k+3 have 2, 3, 4, 5 prime factors respectively, counted with multiplicity.at n=27A363391
• G.f. A(x) satisfies A(x) = 1 / (1 - x * A(x^4)).at n=34A367794
• Number of irredundant sets in the n-triangular honeycomb queen graph.at n=6A391912