-4025

Appears in sequences

• Generalized Stirling number triangle of first kind.at n=32A049444
• G.f. satisfies: A(x) = 1/(1 + x*A(x^7)) and also the continued fraction: 1 + x*A(x^8) = [1; 1/x, 1/x^7, 1/x^49, 1/x^343, ..., 1/x^(7^(n-1)), ...].at n=41A101917
• Real part of upper left and lower right terms of [1,(1+I); 1,1]^n * [1,0].at n=11A138766
• G.f.: limit of the ratio of the g.f.s of adjacent rows in triangle A152800.at n=34A152803
• a(n) = 2*A276086(n) - A276086(A001065(n)), where A276086 is the primorial base exp-function, and A001065 is the sum of proper divisors of n.at n=41A379494
• a(n) = A276086(1+n) - A276086(A001065(n)), where A276086 is the primorial base exp-function, and A001065 is the sum of proper divisors of n.at n=41A379498
• a(n) is the permanent of the unipotent Sylvester-Kac tridiagonal matrix of order n having main diagonal [0, 2, ..., 2*(n-1)], superdiagonal [1, 2, ..., n-1], and [subdiagonal 1-n, 2-n, ..., -1].at n=6A390821