24004

Appears in sequences

• a(n) = (27*n^2 + 9*n + 2)/2.at n=42A093485
• a(1)=1. a(n+1) = Sum_{k=1..n} a(b(k,n)), where b(k,n) is the largest positive integer that, when written in binary, occurs as a substring in both binary k and binary n.at n=46A175491
• Number of nX2 0..1 arrays with no 1 equal to more than three of its king-move neighbors, with the exception of exactly one element.at n=8A282435
• T(n,k) = Number of n X k 0..1 arrays with no 1 equal to more than three of its king-move neighbors, with the exception of exactly one element.at n=46A282441
• A digitized pure tuning tone, sampled at standard settings for consumer audio: a(n) = floor(sin(2*Pi*(440/44100)*n)*32767).at n=37A320277
• Expansion of (1 + x^3 - x^4)/((1 + x^3 - x^4)^2 - 4*x^3).at n=29A376727
• Triangle read by rows: numerators of the almost-Riordan array ( (-6*x - 3 - 3*sqrt(12*x^2 - 8*x + 1))/(8*x^2 - 3*x - 3 + (3*x - 3)*sqrt(12*x^2 - 8*x + 1)) | 6/(3*(1 - x)*sqrt(12*x^2 - 8*x + 1) - 8*x^2 + 3*x + 3), (1 - 4*x - sqrt(12*x^2 - 8*x + 1))/(2*x) ).at n=29A389739