23527

Appears in sequences

• Column 7 of triangle A055907.at n=6A055913
• Numbers n such that n = pi(n)*k + 1 for some k.at n=28A065136
• a(n) is the smallest integer k > 1 such that k > n * pi(k), where pi() denotes the prime counting function.at n=8A086511
• Values of m such that A139361(n)=4m+1.at n=36A139362
• X values of the complete set of 23 integer solutions to the Ochoa curve equation.at n=19A141144
• Number of n X 10 binary arrays with all 1s connected and a path of 1s from top row to bottom row.at n=1A163036
• Number of n X 2 binary arrays with all 1s connected and a path of 1s from left column to right column.at n=9A163037
• Number of 6-length words w over n-ary alphabet such that for every prefix z of w we have #(z,a_i) = 0 or #(z,a_i) >= #(z,a_j) for all j>i and #(z,a_i) counts the occurrences of the i-th letter in z.at n=7A213285
• Number of n-length words w over 7-ary alphabet such that for every prefix z of w we have #(z,a_i) = 0 or #(z,a_i) >= #(z,a_j) for all j>i and #(z,a_i) counts the occurrences of the i-th letter in z.at n=6A213295
• Number of nXnXn triangular 0..1 arrays with new values introduced in sequential zero-upwards order and exactly one 2x2x2 triangle having values all equal.at n=5A271069
• T(n,k)=Number of nXnXn triangular 0..k arrays with new values introduced in sequential zero-upwards order and exactly one 2x2x2 triangle having values all equal.at n=20A271075
• Squarefree k > 1 with sigma(sigma(sigma(k))) < 3*k + 1.at n=28A320513